Siddiq
Siddiq (, ; meaning 'Truthful') is an Islamic title, used for the first Rashidun caliph Abu Bakr (), both as a name and a title. It is much common among Sunni Muslims. The earliest references of Siddiq being used for Abu Bakr appear in the Hadith literature. Historical usage. After the Isra and Mi'raj event, the Islamic prophet Muhammad informed about the journey to his friends, relatives and other Qurayshite kinsman. Refusing to believe in this journey, numerous Muslims had apostatized from Islam. Abu Bakr was the first person to believe in Muhammad's night journey, and for this reason, Muhammad bestowed  the honorific epithet "Siddiq" upon the former. The 12th-century Damascene scholar Ibn Asakir reports that the angel Gabriel came towards Muhammad and foretold that Abu Bakr is "Siddiq" and that, he will believe in Muhammad's journey. In Fakhr al-Razi's exegesis, after Muhammad describes the journey, Abu Bakr says "I witness that you are indeed the Messenger of God" and in return, Muhammad says "I witness that you are indeed the "Siddiq"" to Abu Bakr. Afterward, the Islamic prophet used Siddiq many times to refer to Abu Bakr. According to the Sahih al-Bukhari, Muhammad was at  the Mount Uhud, along with Abu Bakr, Umar and Uthman, and the mount starting 'shaking'. Muhammad told Uhud to be 'firm', and that there were a prophet, a "Siddiq", and two martyrs. In Islamic accounts, the prophet refers to Muhammad, the Siddiq to Abu Bakr, and the two martyrs were Umar and Uthman, both of whom were assassinated. Abu Qatada al-Ansari () is reported to have said that many Companions of Muhammad () referred to Abu Bakr with the epithet of "Siddiq". In the Quran, there are four ranks of Muslims mentioned. The first are the prophets (), the second are the  truthful (), the third are the martyrs (), and the fourth being the righteous (). In Sunni Islamic reports, Abu Bakr is considered the 'Greatest of the Truthful' (). Among the earliest well-known references to Abu Bakr as the Greatest of the Truthful is in the "Kashf al-Mahjub" () of the 11th-century Sufi mystic Ali Hujwiri. The usage of the title was then extended to Abu Bakr's daughter Aisha (), in its feminine equivalent "Siddiqa". In the early Islamic era, Aisha was commonly referred to as "Siddiqa bint al-Siddiq", meaning 'Truthful, daughter of the Truthful'.