سنن الفطرة
Abu Hurayra (may Allah be pleased with him) reported that the Prophet (may Allah's peace and blessings be upon him) said: "Five are the acts of Fitrah: circumcision, shaving the pubic hair, cutting the mustache, clipping the nails, and plucking the armpit hair."
عن أبي هريرة -رضي الله عنه- مرفوعاً: «الفِطرة خَمْسٌ: الخِتَان, والاسْتِحدَاد, وقَصُّ الشَّارِب, وتَقلِيمُ الأَظفَارِ, ونَتْفُ الإِبِط».
شرح الحديث :
Abu Hurayra (may Allah be pleased with him) mentioned that he had heard the Prophet (may Allah's peace and blessings be upon him) say that five acts are part of the religion of Islam, upon which Allah, the Almighty, created people. Whoever acts upon them, indeed fulfills great characteristics of this true religion. These five acts mentioned in the Hadīth are part of the cleanliness routine that Islam has introduced. 1. Cutting off the foreskin of the male organ: which, if left, will cause impurities and dirt to accumulate, leading to diseases and wounds. 2. Shaving the pubic hair: whether found in the front or back of the sexual organ, for if left unshaved, it makes it exposed to impurities, and it may also cause the Shar‘i purification to be imperfect. 3. Cutting the mustache: which, if left uncut, will deform one's facial look. It is disliked to drink after a man with a mustache. Also, growing a mustache is considered an act of imitation of the Magi. 4. Clipping the nails: which, if left uncut, will cause dirt to gather underneath them and get mixed with food, causing diseases. Unclipped nails may undermine perfection of the purification as they cover part of the areas that should be reached by water. 5. Plucking the hair found in the armpits: which, if left, will cause an offensive odor.