7. Lord hath sworn by the excellency of Jacob—that is, by Himself, in whom Jacob's seed glory [Maurer]. Rather, by the spiritual privileges of Israel, the adoption as His peculiar people [Calvin], the temple, and its Shekinah symbol of His presence. Compare Am 6:8, where it means Jehovah's temple (compare Am 4:2).
never forget—not pass by without punishing (Am 8:2; Ho 8:13; 9:9).