2 Kings 17:12

serving idols, of which the LORD had said unto them, Ye shall not do this.

Exodus 20:3-5

Thou shalt have no other gods before me.

Exodus 34:14

for thou shalt worship no other god; for the LORD, whose name is Jealous, is a jealous God.

Leviticus 26:1

Ye shall make no idols for yourselves nor graven image, neither shall you raise up a title, neither shall ye place any painted stone in your land, to bow down unto it: for I AM your God.

Deuteronomy 4:15-19

Diligently guard, therefore, your souls, for ye saw no manner of likeness on the day that the LORD spoke unto you in Horeb out of the midst of the fire,

Deuteronomy 4:23-25

Keep yourselves, do not forget the covenant of the LORD your God, which he established with you, and make yourselves a graven image or the likeness of any thing, which the LORD thy God has forbidden thee.

Deuteronomy 5:7-9

Thou shalt have no other gods before me.

Deuteronomy 12:4

Ye shall not do so unto the LORD your God.

Treasury of Scripture Knowledge

Summary

For they served idols, whereof the LORD had said unto them, Ye shall not do this thing.

Bible References

Whereof

Exodus 20:3
Thou shalt have no other gods before me.
Exodus 34:14
for thou shalt worship no other god; for the LORD, whose name is Jealous, is a jealous God.
Leviticus 26:1
Ye shall make no idols for yourselves nor graven image, neither shall you raise up a title, neither shall ye place any painted stone in your land, to bow down unto it: for I AM your God.
Deuteronomy 4:19
And lest thou lift up thine eyes unto heaven, and when thou seest the sun and the moon and the stars, even all the host of heaven, and should be driven to worship them and serve them because the LORD thy God has conceded them unto all the peoples under all the heavens.
Deuteronomy 5:7
Thou shalt have no other gods before me.

Ye shall not

Deuteronomy 4:15
Diligently guard, therefore, your souls, for ye saw no manner of likeness on the day that the LORD spoke unto you in Horeb out of the midst of the fire,
Deuteronomy 12:4
Ye shall not do so unto the LORD your God.