And Moses took his wife and his sons, and set them upon an ass, and he returned to the land of Egypt: and Moses took the rod of God in his hand. His wife and his sons - Both Gershom and Eliezer, though the birth of the latter has not yet been mentioned in the Hebrew text. See Clarke's note on Exodus 2:22.
Set them upon an ass - The Septuagint reads the word in the plural, εκι τα ὑποζυγια, upon asses, as it certainly required more than one to carry Zipporah, Gershom, and Eliezer.
The rod of God - The sign of sovereign power, by which he was to perform all his miracles; once the badge of his shepherd's office, and now that by which he is to feed, rule, and protect his people Israel.