Malachi 3:3-7

He will sit as a refiner and purifier of silver, and He will purify the sons of Levi [the priests], and refine them like gold and silver, so that they may present to the LORD [grain] offerings in righteousness. Then the offering of Judah and Jerusalem will be pleasing to the LORD as in the days of old and as in ancient years. “Then I will come near you for judgment; I will be a swift witness against sorcerers, against adulterers, against perjurers, and against those who oppress the laborer in his wages and widows and the fatherless, and against those who turn away the alien [from his right], and those who do not fear Me [with awe-filled reverence],” says the LORD of hosts. [Deut 24:17] “For I am the LORD, I do not change [but remain faithful to My covenant with you]; that is why you, O sons of Jacob, have not come to an end. “Yet from the days of your fathers you have turned away from My statutes and ordinances and have not kept them. Return to Me, and I will return to you,” says the LORD of hosts. “But you say, ‘How shall we return?’