Jeremiah 23:20 in the World English Bible
The LORD’s anger will not return until he has executed and performed the intents of his heart. In the latter days, you will understand it perfectly.
Context
19 Behold, a whirlwind of the LORD is gone forth in fury, even a grievous whirlwind: it shall fall grievously upon the head of the wicked.
20 The anger of the LORD shall not return, until he have executed, and till he have performed the thoughts of his heart: in the latter days ye shall consider it perfectly.
21 I have not sent these prophets, yet they ran: I have not spoken to them, yet they prophesied.