Malachi 4:6 WBT

⁴  Remember ye the law of Moses my servant, which I commanded to him in Horeb for all Israel, [with] the statutes and judgments.

⁵  Behold, I will send you Elijah the prophet before the coming of the great and dreadful day of the LORD:

⁶  And he shall turn the heart of the fathers to the children, and the heart of the children to their fathers, lest I come and smite the earth with a curse.