Lady Aisha (may Allah be pleased with her) narrates that the Noble Prophet (peace and blessings be upon him) said: Ten things are from the natural disposition (fitrah): trimming the moustache, letting the beard grow, using the miswak, rinsing the nose with water and cleaning it, cutting the nails, thoroughly washing the joints and tips of the fingers, plucking the hair from the armpits, shaving the pubic hair, and performing istinja (cleaning oneself after relieving oneself). Mus'ab, the narrator, says: I forgot the tenth thing; it seems that it is rinsing the mouth.

Sayyiduna Abu Hurairah (may Allah be pleased with him) narrates that the Noble Prophet (peace and blessings be upon him) said: Five things are from the natural disposition: trimming the moustache, cutting the nails, plucking the armpit hair, shaving the pubic hair, and performing circumcision.

Sayyiduna Ibn Umar (may Allah be pleased with them both) narrates that the Noble Prophet (peace and blessings be upon him) said: Shaving the hair below the navel, trimming the nails, and cutting the moustache are from the natural disposition (fitrah).

Sayyiduna Ammar bin Yasir (may Allah be pleased with them both) narrates that the Noble Prophet (peace and blessings be upon him) said: These acts are from the natural disposition: rinsing the mouth, drawing water into the nose and blowing it out, trimming the moustache, using the tooth-stick (miswak), cutting the nails, washing the joints and tips of the fingers, plucking the hair of the armpits, shaving the pubic hair, performing circumcision, and sprinkling water over the private parts after ablution.

Sayyiduna Anas bin Malik (may Allah be pleased with him) narrates that the Noble Prophet (peace and blessings be upon him) specified a period of forty days for trimming the moustache, cutting the nails, and shaving the hair below the navel.

Sayyiduna Abu Malih narrates from his father Usamah (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him and his family) said: Circumcision is Sunnah for men and an honor for women.

Abu Kulayb Juhani (may Allah be pleased with him) narrates that I came to the Noble Prophet (peace and blessings be upon him) and I said: I have become a Muslim. The Prophet (peace and blessings be upon him) said: Then cast off the hair of disbelief. Another narrator stated that the Prophet (peace and blessings be upon him) said: Shave the hair of disbelief. Another man informed me that the Noble Prophet (peace and blessings be upon him) said to another person: Remove the hair of disbelief and perform circumcision.

Syedna Abu Hurairah (may Allah be pleased with him) narrates that the Noble Prophet (peace and blessings be upon him) said: Ibrahim Khalil-ur-Rahman (peace be upon him) performed circumcision at the age of eighty (80) years, and he performed circumcision with an adze.

Sayyiduna Zaid bin Arqam (may Allah be pleased with him) narrates that the Noble Prophet (peace and blessings be upon him) said: Whoever does not trim his moustache is not from among us.

Sayyiduna Ibn Abbas (may Allah be pleased with them both) narrates that the Noble Prophet (peace and blessings be upon him) used to trim his moustache, and before him, your father Sayyiduna Ibrahim (peace be upon him) also used to trim his moustache.