Volume 8 · Book 73 · Hadith 141
Narrated Abu Mas'ud: The Prophet said, 'One of the sayings of the early Prophets which the people have got is: If you don't feel ashamed do whatever you like." (See Hadith No 690, 691, Vol 4)
— Sahih Bukhari, Volume 8, Book 73: Good Manners and Form (Al-Adab), Hadith #141