If you feel no shame, do as you wish

On the authority of Abu Mas'ud Uqba ibn Amr al-Ansari al-Badri (may Allah be pleased with him), that the Messenger of Allah (may Allah bless him and grant him peace) said: "Among the words people have retained from the earliest prophecy is this: “If you feel no shame, then do as you wish.”"

Related by al-Bukhari.

[al-Bukhari 3483]