Volume 4 · Book 56 · Hadith 691
Narrated Abu Mus'ud: The Prophet said, "One of the sayings of the prophets which the people have got is, 'If you do not feel ashamed, then do whatever you like."
— Sahih Bukhari, Volume 4, Book 56: Virtues and Merits of the Prophet (pbuh) and his Companions, Hadith #691