Uqba ibn Amr al-Ansari (Arabic: عقبة بن عمرو الأنصاري, romanized: ʿUqba ibn ʿAmr al-Anṣārī), also known by his kunya Abu Mas'ud (Arabic: أبو مسعود, romanized: Abū Masʿūd) al-Ansari was a companion of Muhammad.^{[citation needed]} He was a prominent narrator of hadith, quoted in Sahih Bukhari, the most prominent source of Hadith among Sunni Muslims.^{[citation needed]} He reportedly narrated 102 or more hadiths.^{[citation needed]}

Uqba belonged to Medina and was among those who were present in the Pledge of al-Aqaba and promised that they would protect Muhammad at the cost of their lives.^{[citation needed]} He took part in all battles with Muhammad and is said to have fought heroically.^{[citation needed]}

Uqba opposed the Kufan revolt against Uthman (r. 644–656), the third caliph of the Rashidun Caliphate.^[1] Uthman's successor Ali (r. 656–661) appointed Uqba as the governor of Kufa. Afterward, Uqba married his daughter Umm Bashir to Ali's son Hasan.^[1] The modern historian Wilferd Madelung suggests that Ali was hoping to strength his relations with Uqba.^[1] Hasan and Umm Bashir had two (or possibly three) children with Umm Bashir, with their eldest son Zayd, his daughter Umm al-Husayn. It is also held that the couple had another daughter named Umm al-Hasan.^[1]