Charles Ellicott Commentary Genesis 41:14

"Then Pharaoh sent and called Joseph, and they brought him hastily out of the dungeon: and he shaved himself, and changed his raiment, and came in unto Pharaoh." — Genesis 41:14 (ASV)

He shaved himself. Herodotus (2.36) mentions that the Egyptians allowed their hair and beards to grow only when in mourning, whereas in Palestine the beard was regarded as a manly ornament.

On Egyptian monuments, only captives and men of low condition are represented with beards. In the prison, therefore, Joseph would have left his beard untrimmed, but when summoned into the king’s presence, he would have shaved it off.

Abravanel notices that for each of Joseph's sufferings, there was an exact recompense. It was for dreams that his brothers hated him, and with the help of dreams, he was exalted in Egypt. They stripped him of his many-coloured coat; the Egyptians clothed him in fine linen. They cast him into a pit, and from the pit of the prison, he was brought out by Pharaoh. They sold him into slavery; in Egypt, he was made lord.