Malachi 4:5

5 Behold, I will send you Elijah the prophet before the great and terrible day of Jehovah come.

Malachi 4:5 In-Context

3 And ye shall tread down the wicked; for they shall be ashes under the soles of your feet in the day that I make, saith Jehovah of hosts.
4 Remember ye the law of Moses my servant, which I commanded unto 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 Jehovah come.
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.
The American Standard Version is in the public domain.