Question: Abu Hajal Muslim ibn Awsaja was a companion of what prophet who was the founder of islam, and who united Arabia into a single Muslim polity?

full_context: Document 1: Muslim ibn al-Hajjaj: Abū al-Ḥusayn ‘Asākir ad-Dīn Muslim ibn al-Ḥajjāj ibn Muslim ibn Ward ibn Kawshādh al-Qushayrī an-Naysābūrī (Arabic: أبو الحسين عساكر الدين مسلم بن الحجاج بن مسلم بن وَرْد بن كوشاذ القشيري النيسابوري‎ ‎ ; after 815 – May 875) or Muslim Nīshāpūrī (Persian: ‎ ‎ ), commonly known as Imam Muslim, was a Persian Islamic scholar, particularly known as a "muhaddith" (scholar of hadith). His hadith collection, known as "Sahih Muslim", is one of the six major hadith collections in Sunni Islam and is regarded as one of the two most authentic ("sahih") collections, alongside "Sahih al-Bukhari".
Document 2: Abdullah ibn Unais: Abdullah ibn Unais was a companion (Sahaba) of the Islamic Prophet Muhammad. He participated in several military campaigns ordered by Muhammad. The first was to kill Khaled bin Sufyan Al-Hathali who belonged to the Banu Lahyan tribe at the time of the Islamic Prophet Muhammad. Muhammad alleged that he was planning on attacking Madinah and inciting the people of Nakhla and Uranah to attack him. Therefore he sent Abdullah ibn Unais to assassinate him in 625 during the Expedition of Abdullah Ibn Unais.
Document 3: Hindu–Islamic relations: Hinduism is a diversity-filled socio-religious way of life of the Hindu people of the Indian subcontinent, their diaspora, and some other regions which had Hindu influence in the ancient and medieval times. In Hinduism God can be worshiped in the name one believes or in the form one believes and allows idol worship, hence Hinduism's concept of God does not contradict the concept of Allah, the Islamic God. Islam is a monotheistic religion in which the supreme deity is Allah (Arabic: الله‎ ‎ "the God" : see God in Islam), the last Islamic prophet being Muhammad, whom Muslims believe delivered the Islamic scripture, the Qur'an. Hinduism mostly shares common terms with the "dhārmic" religions, including Buddhism, Jainism and Sikhism. Islam shares common terms with the Abrahamic religions–those religions claiming descent from Abraham–being, from oldest to youngest, Judaism, Christianity, Islam, and Baha'i Faith.
Document 4: Abu Bara: Abū Barāʾ ʿĀmir ibn Mālik ibn Jaʿfar was the preeminent chieftain of the Arab tribe of Banu 'Amir during the time of the Islamic prophet Muhammad and interacted with the latter. During the expedition of Bi'r, four months after the Battle of Uhud, a delegation of Banu 'Amir came to Muhammad and presented him with a gift. Abu Bara' stayed in Medina. Muhammad declined to accept that gift because it was from a polytheist and asked Abu Bara' to embrace Islam. In response, Abu Bara' requested that Muhammad send some Muslims to the people of Najd to invite them to convert to Islam. At first, Muhammad was quite apprehensive of this, as he feared that some harm might befall on these Muslim missionaries. Yo assuage Muhammad’s hesitation, Abu Bara' guaranteed the safety of the Muslim emissaries. He stated, "I will protect them."Ibn Ishaq's Biography claims that forty men were sent to them; but Sahih al-Bukhari states that there were seventy — Al-Mundhir bin ‘Amr, one of Banu Sa‘ida, nicknamed ‘Freed to die’ — commanded that group, who were the best and most learned in the Qur'an and jurisprudence. But the Muslim's were killed
Document 5: Islamic–Jewish relations: Islamic–Jewish relations started in the 7th century AD with the origin and spread of Islam in the Arabian peninsula. The two religions share similar values, guidelines, and principles. Islam also incorporates Jewish history as a part of its own. Muslims regard the Children of Israel as an important religious concept in Islam. Moses, the most important prophet of Judaism, is also considered a prophet and messenger in Islam. Moses is mentioned more in the Quran than any other individual, and his life is narrated and recounted more than that of any other prophet. There are approximately forty-three references to the Israelites in the Quran (excluding individual prophets), and many in the Hadith. Later rabbinic authorities and Jewish scholars such as Maimonides discussed the relationship between Islam and Jewish law. Maimonides himself, it has been argued, was influenced by Islamic legal thought.
Document 6: Muhammad: A Prophet for Our Time: Muhammad: A Prophet For Our Time is a 2006 non-fiction book by the British writer Karen Armstrong. It is part of the "Eminent Lives" series, which are short biographies of famous people by well-known writers. It is Armstrong's second biography of Muhammad. Her first biography "" earned her the Muslim Public Affairs Council Media Award. "Muhammad: A Prophet For Our Time" is a short biography that shows how most Muslims understand Muhammad and their faith. In the book, Armstrong depicts Muhammad as both a mystic and a wise political and social reformer.
Document 7: Abu Hajal Muslim ibn Awsaja: Abu Hajal Muslim ibn Awsaja (Arabic: ابوحَجَل مسلم بن عوسجه الأسدي‎ ‎ ) was a companion of Islamic Prophet Muhammad. He assisted Muslim ibn Aqeel in Kufa. Then he joined Husayn ibn Ali army with his family. He was killed in battle of Karbala.
Document 8: Muhammad in Islam: Muḥammad ibn ʿAbdullāh ibn ʿAbdul-Muṭṭalib ibn Hāshim (Arabic: مُـحَـمَّـد ابْـن عَـبْـد الله ابْـن عَـبْـد الْـمُـطَّـلِـب ابْـن هَـاشِـم‎ ‎ ) (Hebrew: ‎ ‎ Maḥammaddīm), in short form Muhammad, is considered by Muslims to be the last Messenger (رَسُـوْل ) and Prophet (نَـبِي ) sent by God (الله ) to guide humanity to the right way (Quran ) ( 570 – 8 June, 632). They also believe that the Quran, which is the central religious text of Islam, was revealed to Muhammad by God, and that Muhammad was sent to restore Islam, which they believe to be the unaltered original monotheistic faith of Adam, Ibrahim, Musa, 'Isa, and other Prophets. The religious, social, and political tenets that Muhammad established in the light of Quran became the foundation of Islam and the Muslim world.
Document 9: Muhammad ibn Muslim and Ibraheem ibn Muslim: Muhammad ibn Muslim (Arabic: محمد بن مسلم‎ ‎ ) and Ibraheem ibn Muslim (Arabic: إبراهيم بن مسلم‎ ‎ ) were the sons of Muslim ibn Aqeel and the grandsons of Aqeel ibn Abu Talib. Muslim ibn Aqeel was the messenger of Hussain ibn Ali to the people of Kufa, while Aqeel ibn Abu Talib was the brother of Ali ibn Abu Talib and the cousin of Muhammad. These children are also included among the martyrs of the Battle of Karbala.
Document 10: Abu Musallam incident: The Abu Musallam incident was an event where a large group 3000 people, including Salafist Muslims, killed a small group of Shias in their home in a suburb of Cairo on June 23 2013. Among the dead was sheikh Hassan Shehata who was a prominent religious figure among the Egyptian Shia community. Some news sources described the mob as "takfiris", while others described it as being a result of anti-Shia rhetoric steaming from sermons at Friday prayers.
Document 11: Miracles of Muhammad: The Miracles of Muhammad are a number of supernatural occurrences, which as claimed by Islamic tradition were made by Prophet Muhammad (Muḥammad ibn ʿAbdullāh ibn ʿAbdul-Muṭṭalib ibn Hāshim during his lifetime. These miracles are shown either in the Quran or, in the vast majority of cases, in the hadith (traditions of Muhammad). Muhammad's miracles encompass a broad range, such as the multiplication of food, manifestation of water, hidden knowledge, prophesies, healing, punishment, and power over nature.
Document 12: Muhammad: Muhammad (Arabic: محمد‎ ‎ ; ] ; c. 570 CE – 8 June 632 CE) is the prophet and founder of Islam. According to Islamic doctrine, he was God's Messenger, sent to confirm the essential teachings of monotheism preached previously by Adam, Abraham, Moses, Jesus, and other prophets. He is viewed as the final prophet of God in all the main branches of Islam, though some modern denominations diverge from this belief. Muhammad united Arabia into a single Muslim polity and ensured that his teachings, practices, and the Quran formed the basis of Islamic religious belief.
Document 13: Muslim ibn Aqeel: Muslim ibn Aqil Al-Hashimi (Arabic: مسلم بن عقيل الهاشمي) was the son of Aqeel ibn Abu Talib and a member of the clan of Bani Hashim, thus, he is a cousin of Husayn ibn Ali. The people of Kufa called upon Husayn to overthrow the Umayyad dynasty who was on his way to Mecca for the Hajj pilgrimage. He wanted to confirm the loyalty of the people of Kufa, so he sent his cousin and his ambassador, Muslim ibn Aqeel, a famous warrior, to Kufa to observe the situation. He sent a letter to Husayn confirming their loyalty, before knowing that the 30,000 followers that he gained would all betray him. He was executed by the newly installed governor, Ubaydallah ibn Ziyad, on the 9th of Dhul Hijjah, 60 AH, and is buried at the back of Great Mosque of Kufa.
Document 14: Succession to Muhammad: The succession to Muhammad raises questions about the leadership of Islam after his death: Muhammad's successor, how they should be elected, conditions of legitimacy and the role of successor. Answers to these questions have led to several divisions in the Muslim community since the first century of Muslim history, giving rise to the Sunni, Shia and Khawarij schools. After Muhammad's death in AD 632, disagreement broke out over who should succeed him as leader of the Muslim community. Since none of his sons survived into adulthood, hereditary succession was not an option. Umar (Umar ibn al-Khattab), a prominent companion of Muhammad, nominated Abu Bakr. Others added their support, and Abu Bakr was made the first caliph. This choice was disputed by some of Muhammad's companions, who believed that Ali (Ali ibn Abi Talib), the Prophet's cousin and son-in-law, had already been designated as his successor by the Prophet. During the First and Second Fitnas the Islamic community divided into a number of groups, each of which had a specific idea about successorship. After the Rashidun caliphate evolved into monarchies and sultanates, Sunnis held power in most areas; Shias emerged in opposition.
Document 15: Ali: Ali ( ; Arabic: علي‎ , "ʿAlī " ‎ , ] ; 13 Rajab, 21 BH – 21 Ramadan, 40 AH (c. 594 – 29 January 661) was the cousin and son-in-law of Muhammad, the prophet of Islam. He ruled as the fourth caliph from 656 to 661, and was first Imam of Shia Islam from 632 to 661.
ground_truth: Muhammad