(1) N and M read: “and the Rāwandiyya,” which is an error. The Zaydiyya were discussed previously (see, for example, pp. 35–4[0–9]; see also p. 35, n. 9). See also: *Maqālāt al-Islāmiyyīn*, 1/129–141; *al-Milal wa-al-Nihal*, 1/137–143; and *al-Farq bayna al-Firaq*, pp. 19, 22–25. (2) The hadith appears in *Sunan al-Tirmidhī*, 5/297 (Book of Virtues, chapter on the virtues of Alī ibn Abī Tālib…), with the following wording: “Muhammad ibn Bashshār narrated to us… He said: I heard Abū al-Tufayl narrate from Abū Sarīha or Zayd ibn Arqam—Shu'ba was uncertain—from the Prophet—may Allah bless him and grant him peace—who said: ‘Anyone whose *mawlā* (patron) I am has Alī as his *mawlā*.’” Al-Tirmidhī said: “This is a *hasan gharīb* hadith. Shu'ba also narrated this hadith from Maymūn Abū Abd Allāh, from Zayd ibn Arqam, from the Prophet—may Allah bless him and grant him peace—with similar wording. Abū Sarīha was Hudhayfa ibn Asīd, a Companion of the Prophet—may Allah bless him and grant him peace.” Al-Albānī authenticated the hadith in his notes on al-Tabrīzī’s *Mishkāt al-Masābīh*, 3/243. Commenting on the phrase “Shu'ba was uncertain,” he stated: “I say: In *al-Musnad*, it is narrated from Zayd without any uncertainty.” Al-Albānī also authenticated it in *Sahīh al-Jāmi al-Saghīr*, 5/353. The hadith is narrated from Sa'd ibn Abī Waqqās—may Allah be pleased with him—in *Sunan Ibn Mājah*, 1/45 (Introduction, the virtue of Alī…). It is also found in *al-Musnad* (al-Ma'ārif edition) from Alī—may Allah be pleased with him—under nos. 641 (Ahmad Shākir deemed its chain weak), 950, 951, 952, 961, 964 (Ahmad Shākir deemed its chain weak), and 1310; from Ibn Abbās—may Allah be pleased with them both—under no. 3062; and in the al-Halabī edition from al-Barā'—may Allah be pleased with him—at 4/281, from Zayd ibn Arqam—may Allah be pleased with him—at 4/368, 370, 372, 372–372, from Burayda—may Allah be pleased with him—at 5/361, from five or six Companions at 5/366, from Zayd ibn Arqam at 5/370, and from Abū Ayyūb al-Ansārī together with a group of the Ansār at 5/419. The hadith also appears in Imam Ahmad ibn Hanbal’s *Fadā'il al-Sahāba*, edited by Wasī Allāh ibn Muhammad ibn Abbās and published by Umm al-Qurā University, 1403/1983, under nos. 947, 959, 1007, 1021, 1048, 1167, 1177, and 1206. (3) The hadith—with variations in wording—is narrated from Sa'd ibn Abī Waqqās—may Allah be pleased with him—in *al-Bukhārī*, 5/19 (Book of the Virtues of the Prophet’s Companions, chapter on the virtues of Alī ibn Abī Tālib); *Muslim*, 4/1871 (Book of the Virtues of the Companions, chapter on some of the virtues of Alī ibn Abī Tālib); *Sunan al-Tirmidhī*, 5/301–302 (Book of Virtues, chapter on the virtues of Alī ibn Abī Tālib); *Sunan Ibn Mājah*, 1/42–43, 45 (Introduction, chapter on the virtues of the Companions of the Messenger of Allah—may Allah bless him and grant him peace: the virtue of Alī ibn Abī Tālib…); and *al-Musnad* (al-Ma'ārif edition), 3/97. It also appears in *Fadā'il al-Sahāba* under nos. 954, 957, 1030, 1045, 1091, 1143, and 1153.