Exodus 34:14 - Coke's Commentary on the Holy Bible

The Lord, whose name is Jealous— See note on ch. Exodus 20:5 where we have observed, that the context shews this word to signify the jealousy of a husband; in which relation the Lord was pleased to represent himself towards Israel, Thy Maker is thy Husband: and on this account it is, that idolatry is always represented in Scripture as infidelity to this Divine Husband—as spiritual adultery, Exodus 34:15. Some have conceived, that such expressions have reference to the very impure and infamous rites which the heathens paid to many of their idols.