NET
20 The anger of the Lord will not turn back until he has fully carried out his intended purposes. In future days you people will come to understand this clearly.
Darby
20 The anger of Jehovah shall not return, until he have executed, and until he have performed the purposes of his heart: at the end of the days ye shall understand it clearly.
KJV
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.