The high-places of Isaac— That is, of Beer-sheba, where Isaac dwelt and built an altar to the Lord. See Genesis 26:25.
Related Commentaries of Amos 7:9
Amos 7:9
9 And the high places of Isaac shall be desolate, and the sanctuaries of Israel shall be laid waste; and I will rise against the house of Jeroboam with the sword.