Malachi 4:4-6 - Remember What God Has Done And Will Do
4 Remember ye the law of Moses my servant, which I commanded him in Horeb for all Israel, the laws and the judgments. 5 Behold, I send to you Elijah the prophet before the coming of the day of Jehovah, great and terrible: 6 And he turned back the heart of the fathers to the sons, and the heart of the sons to the fathers, lest I shall come and strike the earth with utter destruction.