2 Kings 17:15
And they rejected his statutes, and his covenant that he made with their fathers, and his testimonies which he testified against them; and they followed vanity, and became vain, and went after the heathen that were round about them, concerning whom the LORD had charged them, that they should not do like them.
And they rejected his statutes, and his covenant that he made with their fathers,.... At Sinai and Horeb, see Exodus 24:8,
and his testimonies which he testified against them; calling heaven and earth to witness what he would do to them if they broke his laws, Deuteronomy 4:26, and which were so many testifications of his mind and will what they should do, or otherwise what should be done to them; Ben Gersom also interprets this of the feasts of the passover and tabernacles, which were witnesses of Israel's coming out of Egypt, and of the sanctification and redemption of the firstborn, a testimony of the slaying the firstborn in Egypt:
and they followed vanity; idols, which are vain things for help, can neither hear, see, speak, &c.
and became vain; as sottish and stupid as the idols they worshipped; which is the usual fruit and effect of idolatry, see Romans 1:21
and went after the heathen that were round about them: imitated them in their idolatrous practices, as the Moabites, Ammonites, Edomites, &c. concerning
whom the LORD had charged them, that they should not do like them; of this charge see Deuteronomy 6:13.