2 Earlier, Moses had sent his wife, Zipporah, and his two sons back to Jethro, who had taken them in. 3 (Moses' first son was named Gershom, for Moses had said when the boy was born, "I have been a foreigner in a foreign land." 4 His second son was named Eliezer, for Moses had said, "The God of my ancestors was my helper; he rescued me from the sword of Pharaoh.") 5 Jethro, Moses' father-in-law, now came to visit Moses in the wilderness. He brought Moses' wife and two sons with him, and they arrived while Moses and the people were camped near the mountain of God. 6 Jethro had sent a message to Moses, saying, "I, Jethro, your father-in-law, am coming to see you with your wife and your 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.