When God heard this - literally, “God heard;” that is, he understood this; he was acquainted with it. He heard their prayers addressed to false gods; he heard their praises sung in honor of idols.
He was wroth - This is language taken from the common manner of speaking among people, for language derived from human conceptions and usages must be employed when we speak of God, though it may be difficult to say what is its exact meaning. The general sense is that his conduct toward them was as if he was angry; or was that which is used by a man who is displeased.
And greatly abhorred Israel - The idea in the word rendered abhorred is that of rejecting them with abhorrence; that is, the reference is not merely to the internal feeling or emotion, but to the act which is the proper accompaniment of such an internal feeling. He cast them off; he treated them as not his own. The addition of the word “greatly” shows how intense this feeling was; how decided was his aversion to their conduct.