MALACHI, The coming of the forerunner of the Messiah
4. "Remember the law of Moses my servant, which I commanded to him in Horeb for all Israel, even statutes and ordinances.
5. Behold, I will send you Elijah the prophet before the great and terrible day of the LORD comes.
6. He will turn the hearts of the fathers to the children, and the hearts of the children to their fathers, lest I come and strike the earth with a curse."