Deuteronomy 6:15

For the Lord thy God is a jealous God among you
He was near to them, in the midst of them, his tabernacle being placed between their camps; and was a God jealous of his honour and glory in matters of worship, and would resent any affront given him in that way:

lest the anger of the Lord thy God be kindled against thee;
there being nothing more apt to stir up his wrath than idolatry:

and destroy thee from off the face of the earth;
suffer them to be carried captive out of their own land, and to be scattered among the nations of the world, and be utterly destroyed.