2 Kings 17:12

For they served idols, of which the LORD had said to them, Ye shall not do this thing.

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 you no idols nor graven image, neither rear you up a standing image, neither shall ye set up any image of stone in your land, to bow down to it: for I am the LORD your God.

Deuteronomy 4:15-19

Take ye therefore good heed to yourselves; for ye saw no manner of similitude on the day that the LORD spoke to you in Horeb out of the midst of the fire;

Deuteronomy 4:23-25

Take heed to yourselves, lest ye forget the covenant of the LORD your God, which he made with you, and make you a graven image, or the likeness of any thing which the LORD thy God hath forbidden thee.

Deuteronomy 5:7-9

Thou shalt have no other gods before me.

Deuteronomy 12:4

Ye shall not do so to 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 you no idols nor graven image, neither rear you up a standing image, neither shall ye set up any image of stone in your land, to bow down to it: for I am the LORD your God.
Deuteronomy 4:19
And lest thou shouldst lift up thy eyes to heaven, and when thou seest the sun, and the moon, and the stars, even all the host of heaven, shouldst be driven to worship them, and serve them, which the LORD thy God hath divided to all nations under the whole heaven.
Deuteronomy 5:7
Thou shalt have no other gods before me.

Ye shall not

Deuteronomy 4:15
Take ye therefore good heed to yourselves; for ye saw no manner of similitude on the day that the LORD spoke to you in Horeb out of the midst of the fire;
Deuteronomy 12:4
Ye shall not do so to the LORD your God.