Malachi 3:5, 18

“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.

And you will again see the distinction between the righteous and the wicked, between those who serve God and those who do not.