Malachi 3:5-6

5“So I will come to put you on trial. I will be quick to testify against sorcerers, adulterers and perjurers, against those who defraud laborers of their wages, who oppress the widows and the fatherless, and deprive the foreigners among you of justice, but do not fear me,” says the Lord Almighty.

6“I the Lord do not change. So you, the descendants of Jacob, are not destroyed.