Maliks Muwatta Book 049, Hadith Number 003.

Section : Sunna of the Fitra.

Yahya related to me from Malik from Said ibn Abi Said al-Maqburi from his father that Abu Hurayra said, "There are five things from the fitra cutting the nails, trimming the moustache, removing the hair from the armpit, shaving the pubic region and circumcision."