Sakhr ibn Harb ibn Umayya ibn Abd Shams (; — ), better known by his "kunya" Abu Sufyan (), was a prominent opponent turned companion of the Islamic prophet Muhammad. He was a leader and merchant from the Quraysh tribe of Mecca. During his early career, he often led trade caravans to Syria. He had been among the main leaders of Meccan opposition to Muhammad, the prophet of Islam and member of the Quraysh, commanding the Meccans at the battles of Uhud and the Trench in 625 and 627. However, when Muhammad entered Mecca in 630, Abu Sufyan was among the first to submit and was given a stake in the nascent Muslim state, playing a role at the Battle of Hunayn and the subsequent destruction of the polytheistic sanctuary of al-Lat in Ta'if. After Muhammad's death, he may have been appointed the governor of Najran by Caliph Abu Bakr () for an unspecified period. Abu Sufyan later played a supporting role in the Muslim army at the Battle of Yarmouk against the Byzantines in Syria. His sons Yazid and later Mu'awiya were given command roles in that province and the latter went on to establish the Umayyad Caliphate in 661.