2 Jethro, Moses' father-in-law, had taken in Zipporah, Moses' wife who had been sent back home, 3 and her two sons. The name of the one was Gershom (Sojourner) for he had said, "I'm a sojourner in a foreign land"; 4 the name of the other was Eliezer (God's-Help) because "The God of my father is my help and saved me from death by Pharaoh." 5 Jethro, Moses' father-in-law, brought Moses his sons and his wife there in the wilderness where he was camped at the mountain of God. 6 He had sent a message ahead to Moses: "I, your father-in-law, am coming to you with your wife and two sons."
Matthew Henry's Commentary on Exodus 18:2-6
Commentary on Exodus 18:1-6
(Read Exodus 18:1-6)
Jethro came to rejoice with Moses in the happiness of Israel, and to bring his wife and children to him. Moses must have his family with him, that while he ruled the church of God, he might set a good example in family government, 1 Timothy 3:5.