Amos 8:7

The Lord hath sworn by the excellency of Jacob
Not by the ark, as R. Japhet; nor by the temple, as Kimchi; but by himself; which sense Kimchi also mentions, and Aben Ezra; the God of Jacob and his glory, the most excellent of all Jacob's enjoyments, and of whom he had reason to boast and glory; see ( Amos 6:8 ) ; surely I will never forget any of their works;
their wicked works, especially those now mentioned; God forgets when he forgives them, or suffers them to go unpunished; but though he had done so long, he would do so no more; on which they might depend, since he had not only said it, but swore to it.