Malachi 3:5-6

5“At that time I will put you on trial. I am eager to witness against all sorcerers and adulterers and liars. I will speak against those who cheat employees of their wages, who oppress widows and orphans, or who deprive the foreigners living among you of justice, for these people do not fear me,” says the Lord of Heaven’s Armies.

6“I am the Lord, and I do not change. That is why you descendants of Jacob are not already destroyed.