Ye shall not go after. In this passage Moses commands the people not to turn away from the simple service of God, although examples of superstition may present themselves to their sight on every side. For this was a very destructive temptation, that none could be anywhere found who subscribed to the doctrine of the Law, although the respective nations had some religion, or at any rate the name of it existing among them. Since, therefore, these various forms of worship were so many temptations to forsake the right way, it was needful to provide against the danger betimes, and so to establish the authority of the One God, that the Jews might have courage to despise the common belief of all the Gentiles. A threat is added, that vengeance would not be far off if they should fall away into these superstitions, since God is a jealous God, and dwelling among them. As to the former epithet, I am about to say more under the Second Commandment. Meanwhile, let my readers observe that God is called jealous, because He permits no rivalry which may detract from His glory, nor does He suffer the service which is due to Him alone to be transferred elsewhere. When He reminds the people that he dwells among them, it is partly to inspire terror by reason of His presence, and partly to reprove indirectly their ingratitude, if they should forsake Him, and seek for themselves gods who are afar off.

Ye shall not go after other gods - The object of religious worship among every people, whether that object be true or false, is ever considered as the pattern or exemplar to his worshippers. Christians are termed the followers of God; they take God for their pattern, and walk - act, as he does. Hence we see the meaning of the terms in this verse: Ye shall not go after - ye shall not take false gods for your patterns. The Canaanites, Greeks, Romans, etc., were a most impure people, because the objects of their worship were impure, and they went after them, i. e., were like their gods. This serves to show us that such as our Redeemer is, such should we be; and indeed this is the uniform language of God to man: Be ye holy, for I am holy, Leviticus 21:8; Be ye perfect, as your Father who is in heaven is perfect, Matthew 5:48.

Ye shall not go after other gods,.... To serve and worship them, and swear by them; and which indeed are no gods, only nominal and fictitious ones; idols which are nothing in the world, and ought to have no veneration and adoration given them; to go after them is to worship them, and this is to depart from the true God, and go a whoring after false deities:
of the gods of the people which are round about you; the gods of the Edomites, Ammonites, Moabites, Philistines, and Egyptians; all of which had their peculiar deities.

The worship of Jehovah not only precludes all idolatry, which the Lord, as a jealous God, will not endure (see at Exodus 20:5), but will punish with destruction from the earth ("the face of the ground," as in Exodus 32:12); but it also excludes tempting the Lord by an unbelieving murmuring against God, if He does not remove any kind of distress immediately, as the people had already sinned at Massah, i.e., at Rephidim (Exodus 17:1-7).