Revelation 20:13 alludes to Psalm 28:4:
Give them the punishment they so richly deserve! Measure it out in proportion to their wickedness. Pay them back for all their evil deeds! Give them a taste of what they have done to others.

Revelation 20:13 alludes to Psalm 62:12:
unfailing love, O Lord, is yours. Surely you repay all people according to what they have done.

Revelation 20:13 alludes to Proverbs 24:12:
Don’t excuse yourself by saying, “Look, we didn’t know.” For God understands all hearts, and he sees you. He who guards your soul knows you knew. He will repay all people as their actions deserve.

Revelation 20:13 echoes Isaiah 59:18:
He will repay his enemies for their evil deeds. His fury will fall on his foes. He will pay them back even to the ends of the earth.

Revelation 20:13 echoes Jeremiah 17:10:
But I, the Lord, search all hearts and examine secret motives. I give all people their due rewards, according to what their actions