Now return the man’s wife, for he is a prophet, and he will pray for you and you will live. But if you do not return her, you may be sure that you and all who belong to you will die.”
Genesis 20:7 (NIV)
Genesis 20:7 is the first time anyone is called a “prophet” of God. It is נָבִיא (navi) This word never appears again in Genesis, and is not mentioned until Exodus, where God tells Moses, “I have made you like a god to pharaoh, and Aaron your brother like a prophet” in Exodus 7:1.