ʿAbdullah b. Abū Quḥāfah (Arabic: عَبْد ٱللَّٰه بْن أَبِي قُحَافَة, c. 573 – August 634), known by his kunya Abū Bakr (Arabic: أَبُو بَكْر), was the first Rashidun caliph ruling from 632 until his death in 634. As a senior companion of the Prophet ﷺ and, through his daughter ʿĀʾishah ﵂, also his father-in-law, Abu Bakr is referred to with the honorific title al-Ṣiddīq.
Born to Abu Quhafa and Umm al-Khayr of the Banu Taym, Abū Bakr ﵁ was amongst the earliest converts to Islam and propagated Islam, as a result of which many of the prominent Ṣaḥābah ﵃ became Muslim. He was known to have freed slaves, including Bilāl b. Rabāḥ ﵁. He suffered persecution by the Mushrikites and later accompanied the Prophet ﷺ on his migration to Medina. Abū Bakr ﵁ participated in the Prophet's ﷺ expeditions against the Mushrikites. In the absence of the Prophet ﷺ, Abū Bakr ﵁ led the prayers and expeditions.