John Gill Commentary 2 Kings 17:38

"and the covenant that I have made with you ye shall not forget; neither shall ye fear other gods:" — 2 Kings 17:38 (ASV)

And the covenant that I have made with you, you shall not
forget
The law given at Mount Sinai; the first table of which chiefly concerned the worship of the one true and living God, and forbid the worship of any other, as follows:

neither shall you fear other gods ;
or make them the object of worship.