Jethro, Midian's priest and Moses' father-in-law, heard about everything that God had done for Moses and for God's people Israel, how the LORD had brought Israel out of Egypt.
References for Exodus 18:1
Moses' father-in-law Jethro took with him Zipporah, Moses' wife whom he had sent away,
along with her two sons. One was named Gershom because he said, "I have been an immigrant living in a foreign land."
References for Exodus 18:3
The other was named Eliezer because he said, "The God of my ancestors was my helper who rescued me from Pharaoh's sword."
References for Exodus 18:4
Jethro, Moses' father-in-law, brought Moses' sons and wife back to him in the desert where he had set up camp at God's mountain.
He sent word to Moses: "I, your father-in-law Jethro, am coming to you along with your wife and her two sons."