Charles Ellicott Commentary Jeremiah 32:18

"who showest lovingkindness unto thousands, and recompensest the iniquity of the fathers into the bosom of their children after them; the great, the mighty God, Jehovah of hosts is his name;" — Jeremiah 32:18 (ASV)

Thou showest lovingkindness unto thousands ... —These words are, in part, an echo from Exodus 20:6, yet more from the revelation of the Divine glory in Exodus 34:7.

They recognize the laws of a righteous retribution, which works even through the seeming injustice of visiting the sins of the fathers upon the children—a principle inseparable from the continuity of family or national life, and which had been caricatured in the sour grapes proverb of Jeremiah 31:29. They also recognize a mercy that is wider than that retribution, and at last triumphant.

In Mighty God, we have the reproduction of the name used by Isaiah in his great Messianic prediction (Isaiah 9:6).