2 Kings 17:38

And you are to keep in memory the agreement which I have made with you; and you are to have no other gods.

Deuteronomy 4:23

Take care that you do not let the agreement of the Lord your God, which he has made with you, go out of your mind, or make for yourselves images of any sort, against the orders which the Lord your God has given you.

Deuteronomy 6:12

Then take care that you keep your hearts true to the Lord, who took you out of the land of Egypt, out of the prison-house.

Deuteronomy 8:14-18

Take care that your hearts are not lifted up in pride, giving no thought to the Lord your God who took you out of the land of Egypt, out of the prison-house;

Treasury of Scripture Knowledge

Summary

And the covenant that I have made with you ye shall not forget; neither shall ye fear other gods.

Bible References

Ye shall not forget

Deuteronomy 4:23
Take care that you do not let the agreement of the Lord your God, which he has made with you, go out of your mind, or make for yourselves images of any sort, against the orders which the Lord your God has given you.
Deuteronomy 6:12
Then take care that you keep your hearts true to the Lord, who took you out of the land of Egypt, out of the prison-house.
Deuteronomy 8:14
Take care that your hearts are not lifted up in pride, giving no thought to the Lord your God who took you out of the land of Egypt, out of the prison-house;

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain