Malachi 3:4

1 See, I am sending my servant, and he will make ready the way before me; and the Lord, whom you are looking for, will suddenly come to his Temple; and the angel of the agreement, in whom you have delight, see, he is coming, says the Lord of armies.

2 But by whom may the day of his coming be faced? and who may keep his place when he is seen? for he is like the metal-tester's fire and the cleaner's soap.

3 He will take his seat, testing and cleaning the sons of Levi, burning away the evil from them as from gold and silver; so that they may make offerings to the Lord in righteousness.

4 Then the offering of Judah and Jerusalem will be pleasing to the Lord, as in days gone by, and as in past years.

5 And I will come near to you for judging; I will quickly be a witness against the wonder-workers, against those who have been untrue in married life, against those who take false oaths; against those who keep back from the servant his payment, and who are hard on the widow and the child without a father, who do not give his rights to the man from a strange country, and have no fear of me, says the Lord of armies.

6 For I am the Lord, I am unchanged; and so you, O sons of Jacob, have not been cut off.

7 From the days of your fathers you have been turned away from my rules and have not kept them. Come back to me, and I will come back to you, says the Lord of armies. But you say, How are we to come back?