It is narrated from Sayyiduna Uthman bin Affan (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Everything beyond the shade of a house, a piece of bread, and a garment that covers a man's private parts (or he said: the private parts of the son of Adam), and whatever is beyond that, the son of Adam has no right to it."
Hadith Referenceالمعجم الكبير للطبراني / العشرة / 146