Sahih Bukhari
Asking Permission
Volume: 008 / Book Number: 074 / Hadith Number: 312
Narrated Abu Huraira:
The Prophet said "Five things are in accordance with Al Fitra (i.e. the tradition of prophets): to be circumcised, to shave the pelvic region, to pull out the hair of the armpits, to cut short the moustaches, and to clip the nails.'