34:11 Observe that which I command thee - We cannot expect the benefit of the promises, unless we make conscience of the precepts. The two great precepts are, Thou shalt worship no other gods - A good reason is annexed; for the Lord, whose name is Jealous, is a jealous God - As tender in the matters of his worship as the husband is of the honour of the marriage - bed. Thou shalt make thee no molten gods - Thou shalt not worship the true God by images. This was the sin they had lately fallen into, which therefore they are particularly cautioned against. That they might not be tempted to worship other gods, they must not join in affinity or friendship with those that did.
34:10-17 The Israelites are commanded to destroy every monument of idolatry, however curious or costly; to refuse all alliance, friendship, or marriage with idolaters, and all idolatrous feasts; and they were reminded not with idolaters, and all idolatrous feats; and they were reminded not to repeat the crime of making molten images. Jealously is called the rage of a man, Pr 6:34; but in God it is holy and just displeasure. Those cannot worship God aright, who do not worship him only.