Hadith #20 (The Forty Hadith of Imam Nawawi)
Book: Modesty (haya) is part of faith
Narrator(s): Abu Masood Uqbah ibn Amr al-Ansaree al-Badree
Grade: Sahih

Verily, from what was learnt by the people from the speech of the earliest prophecy is: If you feel no shame, then do as you wish.

Source: https://parallelquran.com/hadith/forty-nawawi-20/