Exodus 18:1-5

Now Jethro (Reuel), the priest of Midian, Moses’ father-in-law, heard of all that God had done for Moses and for Israel His people, and that the LORD had brought Israel out of Egypt. Then Jethro, Moses’ father-in-law, took Moses’ wife Zipporah, after he had sent her away [from Egypt], along with her two sons, of whom one was named Gershom (stranger), for Moses said, “I have been a stranger in a foreign land.” The other [son] was named Eliezer (my God is help), for Moses said, “The God of my father was my help, and He rescued me from the sword of Pharaoh.” Then Jethro, his father-in-law, came with Moses’ sons and his wife to [join] Moses in the wilderness where he was camped, at the mountain of God [that is, Mt. Sinai in Horeb].