In the Book of Leviticus, God tells who not to shave his beard?
In chapter 19, verse 7 of the Bible's Book of Leviticus, God speaks to Moses, saying, "Do not cut the hair at the sides of your head or clip off the edges of your beard." Moses is then told to repeat this, and God's other instructions, to the Israelites. Traditionally, Moses is depicted as having a full, white beard, as in the 1956 Charlton Heston movie "The Ten Commandments."
Source: BibleHub