Behold, I am sending My messenger, and He will clear the way before Me. And the Lord whom you are seeking shall suddenly come to His temple, even the Angel of the Covenant, in whom you delight. Behold, He comes, says Jehovah of Hosts.
For, behold, the day is coming, burning like a fire pot; and all the arrogant and every doer of wickedness will be chaff. And the coming day will set them ablaze, says Jehovah of Hosts, which will not leave root or branches to them.
And he will go ahead before Him in the spirit and power of Elijah “to turn the hearts of fathers to their children,” and disobedient ones to the wisdom of the just, to make ready a people having been prepared for the Lord. Mal. 4:5, 6