(20) His sons.--Only one had been mentioned previously, viz., Gershom (Exodus 2:22), unless we accept the Vulgate addition to that place. But another had been recently born to him.

Set them upon an ass.--Heb., upon the ass, i.e., cither "upon his ass," or, according to some, "upon asses." The singular of a substantive with the article is sometimes used for the genus (Genesis 15:11).

He returned.--Rather, set out to return (??????????, LXX.).

The rod of God.--An emphatic phrase. God's endowment of the rod with miraculous power had made it "the rod of God." It was the instrument by means of which most of the plagues and the other miracles were wrought (Exodus 7:20; Exodus 8:6; Exodus 8:17; Exodus 9:23; Exodus 10:13; Exodus 14:16; Exodus 17:5; Numbers 20:9; &c).

Verse 20. - His sons. Gershom, already mentioned (Exodus 2:22), and Eliezer (Exodus 18:4), who was probably an infant. Set them upon an ass. Literally, "the ass," i.e. the one ass that belonged to him. The word might best be translated "his ass." When Moses is said to have "set them upon" the animal, we need not understand "all of them." Probably Zipporah and her baby rode, while Gershom walked with his father. Though horses were known in Egypt before this, they could not be used in the Sinaitic peninsula, and the employment of an ass by Moses is thoroughly appropriate. Returned. I.e. "set out to return." Took the rod of God in his hand. This is of course the "rod" of ver. 2, which had become "the rod of God" by the miracle of vers. 3 and 4, and which God had commanded him to take to Egypt (ver. 17).

4:18-23 After God had appeared in the bush, he often spake to Moses. Pharaoh had hardened his own heart against the groans and cries of the oppressed Israelites; and now God, in the way of righteous judgment, hardens his heart against the teaching of the miracles, and the terror of the plagues. But whether Pharaoh will hear, or whether he will forbear, Moses must tell him, Thus saith the Lord. He must demand a discharge for Israel, Let my son go; not only my servant, whom thou hast no right to detain, but my son. It is my son that serves me, and therefore must be spared, must be pleaded for. In case of refusal I will slay thy son, even thy first-born. As men deal with God's people, let them expect so to be dealt with.And Moses took his wife, and his sons,.... Gershom and Eliezer; by which it appears that he intended to stay in Egypt, and that he believed that God would work deliverance by him:

and set them upon an ass: which though with us a mean creature, yet in those times and countries were rode upon by great personages; and these, as Aben Ezra says, were reckoned in Egypt more honourable than mules. It may be the singular is put for the plural, and that each of them was set upon an ass, with servants to take care of them:

and he returned to the land of Egypt; that is, he set forward to go thither; for before he got thither, various things are related which befell him:

and Moses took the rod of God in his hand: his shepherd's staff, so called, because God ordered him to take it; and besides, he had wrought signs and wonders by it already, and would do many more.