Genesis 39:12

His garment. It is not certain what kind of garment Joseph wore. The Hebrew word, beged, is a general term for clothing, and may even mean a blanket. Most commentators have thought of it as a long gown thrown over the shoulders. In ancient Egyptian reliefs and paintings, however, men rarely appear in long garments. The standard dress of a man, from king to slave, was a loincloth. In the case of royalty, it was of fine material, immaculately clean, and starched. For all others it was of less value, its quality being determined by social standing. Overseers are occasionally pictured with a white piece of cloth hanging from their shoulders and wound around the body. Perhaps it was this that Potiphar’s wife snatched from Joseph as he fled from the house.