That which he had devised - Or, what he purposed. Zion’s ruin was the fulfillment of God’s determination, of which they had been forwarned from the days of old (see the margin reference).
Fulfilled - Or, finished.
Related Commentaries of Lamentations 2:17
Lamentations 2:17
17 The LORD hath done that which he had devised; he hath fulfilled his word that he had commanded in the days of old: he hath thrown down, and hath not pitied: and he hath caused thine enemy to rejoice over thee, he hath set up the horn of thine adversaries.