(1) N and M read: “if.” (2) Al-Asharī states in *Maqālāt al-Islāmiyyīn*, 1:198–201, that the Jahmiyya among the Murjia say: “Faith is not divisible, nor do its adherents differ in degree with respect to it.” According to the Sālihiyya among the Murjia, faith neither increases nor decreases. Al-Asharī also states that the Simmariyya, the followers of Yūnus al-Simmarī, maintain that faith consists of knowing Allah, submitting to Him—which means refraining from arrogance toward Him—and loving Him. Whoever possesses all these qualities is a believer, but may become an unbeliever if he abandons any one of them. The views of the Shimriyya, the followers of Abū Shimr, and the Yūnusiyya, the followers of Yūnus, are similar. They say that faith consists of knowing Allah; submitting to Him and loving Him in one’s heart; affirming that He is One and that nothing is like Him; and acknowledging the prophets and believing in them. They do not call any single one of these qualities faith, or even part of faith, until all of them are combined—just as a horse is not called piebald until both black and white are present in it. The Shabībiyya among the Khawārij’s Murjia say that a person cannot be a believer unless he fulfills every constituent of faith. A single constituent of faith may constitute obedience and part of faith, yet its possessor may be an unbeliever because he has abandoned another part of faith. (3) A and W read: “a mustard seed.” (4) The hadith is narrated from Abd Allah ibn Masūd—may Allah be pleased with him—in Muslim, 1:93, Book of Faith, “Chapter on the Prohibition and Explanation of Arrogance.” Its wording is: “No one who has faith in his heart equal in weight to a mustard seed will enter the Fire, and no one who has arrogance in his heart equal in weight to a mustard seed will enter Paradise.” With slight differences in wording, the hadith also appears in *Sunan Abī Dāwūd*, 4:84, Book of Clothing, “Chapter on Reports Concerning Arrogance”; *Sunan Ibn Mājah*, 1:22–23, Introduction, “Chapter on Faith”; and the Book of the Description of Hell, “Chapter on Reports That the Fire Has Two Breaths.” Its wording is: “Whoever has an atom’s weight of faith in his heart will emerge from the Fire.” Abū Saīd said: “Whoever doubts this should recite: ‘Indeed, Allah does not wrong even by an atom’s weight.’” Al-Tirmidhī said: “This is a *hasan sahīh* (good and sound) hadith.” Al-Suyūtī also cited it, and al-Albānī graded it authentic in *Sahīh al-Jāmi al-Saghīr*. It is also found in *Musnad Ahmad* and *Sunan al-Nasā’ī*.