'Jealous God' in the Bible

For the LORD your God is a devouring fire, a jealous God.

You shall not bow down yourself to them, nor serve them; for I, the LORD, your God, am a jealous God, visiting the iniquity of the fathers on the children, and upon the third and upon the fourth [generation] of those who hate me;

for the LORD your God in the midst of you is a jealous God; lest the anger of the LORD your God be kindled against you, and he destroy you from off the face of the earth.