It is narrated from Hazrat Abu Mas'ud (may Allah be pleased with him) that the Holy Prophet (peace and blessings of Allah be upon him) said: Among the words that people have found from the first prophethood is this: "If you do not feel shame, then do whatever you wish."
Hadith Referenceمسند احمد / مسند الأنصار رضي الله عنهم / 22345