(1) The eminent Companion Jabir ibn Abd Allah ibn Amr ibn Haram ibn Kab ibn Ghanm al-Ansari al-Salami was one of the most prolific narrators of hadith. He was present at the Pledge of Aqaba and at most of the Prophet’s campaigns, and after the Prophet’s death he conducted a teaching circle in the Prophet’s Mosque. He died, may Allah be pleased with him, in either 74 AH or 76 AH. See: al-Isaba fi tamyiz al-sahaba 1/213, no. 1026. (2) In codex B the reading is “from him,” in the singular, whereas the dual pronoun is preferable because his father was also a Companion. See: al-Isaba 1/213. (3) Abd Allah ibn Abi Quhafa Uthman ibn Amir al-Qurashi, better known as Abu Bakr al-Siddiq, was the Prophet’s successor (khalifa) and the first adult male to embrace Islam. Born two and a half years after the Year of the Elephant, he remained at the Prophet’s side before and after the mission, accompanied him on the Hijra, and took part in every campaign. He is one of the ten promised Paradise and the most virtuous of the Companions. He was acclaimed caliph on the Prophet’s death and ruled until he died in Jumada al-Ula 13 AH, aged sixty-three. See: al-Isaba 2/341–344, no. 4817. (4) Codices C, D, and Ṭ read an tafalu (“that you do”), whereas Muslim’s wording is latafalun (“you will surely do”). (5) See Sahih Muslim, Book of Prayer, chapter “The follower conforming to the imam,” hadith 413, 1/309. (6) See Sunan Abu Dawud, Book of Prayer, chapter “The imam prays seated,” hadith 606, 1/405. (7) Al-Layth ibn Saʿd ibn Abd al-Rahman al-Fahmi, Abu al-Harith, the Egyptian imam, was among the foremost jurists, scholars, and muftis of his age and a trustworthy hadith master. All the leading critics endorsed his reliability, and Ibn Hibban described him as one of the notables of his time in jurisprudence, piety, knowledge, virtue, and generosity. He was born in 95 AH and died in 175 AH. See: Tahdhib al-tahdhib 8/459–465, no. 832 L.