Wajikra 26:24 Midrasch: Eikhah Rabbah

“The Lord accomplished what He devised: He implemented His statement that He commanded from the days of old; He destroyed and had no compassion. He caused the enemy to rejoice over you, raised the horn of your antagonists” (Lamentations 2:17).
“Their heart cried to the Lord: Wall of the daughter of Zion, let tears fall like a stream, day and night; do not give yourself respite, let the apple of your eye not cease” (Lamentations 2:18).
“The Lord accomplished what He devised.” Rabbi Ahava son of Rabbi Ze’eira said: From the moment that the Holy One blessed be He said: “If despite this you do not heed Me…I, too, will walk with you casually” (Leviticus 26:18, 24), did He, Heaven forbid, do so? Rather, “the Lord accomplished [what He devised: He implemented [bitza] His statement that He commanded from the days of old].” He compromised.¹²¹The term bitzua also means compromise. Rabbi Yaakov of Kefar Ḥanan said: He rent [beza] His raiment.
“He caused the enemy to rejoice over you.” Rabbi Aḥa said: In good times, He rejoiced with them, as it is written: “For the Lord will return to rejoice over you for good, as He rejoiced over your fathers” (Deuteronomy 30:9). But in bad times, He causes others to rejoice. That is what is written: “He caused the enemy to rejoice over you, raised the horn of your antagonists.” In that regard it is said: “Their heart cried to the Lord: Wall of the daughter of Zion, [let tears] fall…”¹²²God caused the enemies to rejoice but He did not rejoice with them.