Verses 1–6
EXODUS - CHAPTER EIGHTEEN
Verses 1-6:
Shortly after the circumcision of his son (Ex 4:20-26), Moses likely sent Zipporah and their sons back to live with her father. In Ex 3:1, Zipporah’s father is called Reuel. In the present text he is called Jethro. (See comments on Ex 4:18).
Following Israel’s victory over Amalek, Jethor brought Zipporah and her two sons to meet Moses, at the "mount of God." This was likely in the plain Er-Rahah, near Sinai. There is no mention in Scripture that Moses had "dismissed" his wife and sons. It is assumed that the readers were aware of this fact.
Moses showed his faith in the names he gave his two sons. "Gershom" denots that Moses was a stranger in the land where his son was born (see Ex 2:22). "Eliezer" means "my God is my help." This was Moses’ acknowledgment that Jehovah had delivered him from Pharaoh.
Custom of the day implies that Jethro sent a messenger to inform Moses of his arrival.