their mustaches.

Ibn Ḥibbān also transmits—on the authority of Ibn ʿUmar—that the Messenger of Allah ﷺ once mentioned the Magians and said, “They allow the ends of their mustaches to grow while shaving their beards; therefore differ from them.” Because of this, Ibn ʿUmar would keep the ends of his own mustache closely trimmed.

He likewise records from Abū Hurayrah that the Messenger of Allah ﷺ said, “Among the features of Islam’s natural disposition (fiṭrah) are trimming the mustache and leaving the beard. The Magians grow out their mustaches and shave their beards, so differ from them: trim your mustaches and let your beards grow.”

Muslim relates from Ibn ʿUmar that the Prophet ﷺ said, “We have been commanded to clip the mustache and to leave the beard.”

He also narrates from Abū Hurayrah that the Messenger of Allah ﷺ said, “Clip the mustaches and let the beards grow long.” The verb “clip” (jazzu) means to shorten, while “let grow long” (arkhū) means to lengthen. Some transmit it with the wording “arjū,” meaning “leave them be.” The wording “clip” does not contradict “shave closely,” for the latter wording is found in both Ṣaḥīḥ collections and clarifies what is meant. Another narration states, “Let the beards remain full,” that is, leave them completely intact.

Shaykh al-Islām Ibn Taymiyyah declared: “Shaving the beard is unlawful.” Al-Qurṭubī likewise said: “It is impermissible to shave, pluck, or cut the beard.”