2 Kings 17 15
They gave up on his regulations and the covenant he had made with their forefathers, as well as the decrees he had given them. They followed pointless idols and they became pointless themselves, copying the nations around them that the Lord ordered them not to copy.
Compare with other 3 random translations
KJV 2 Kings 17:15And 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.
AMP 2 Kings 17:15They despised and rejected His statutes and His covenant which He made with their fathers and His warnings to them, and they followed vanity (false gods–falsehood, emptiness, and futility) and [they themselves and their prayers] became false (empty and futile). They went after the heathen round about them, of whom the Lord had charged them that they should not do as they did.
NAS 2 Kings 17:15They rejected His statutes and His covenant which He made with their fathers, and His warnings which He gave them. And they followed idols and became empty, and followed the nations that surrounded them, about which the Lord had commanded them not to do as they did.