Hebrews 10:30

For we know God, who said [Deut. 32:35], "Revenge belongs to me; I will pay back [for wrongdoing]." And again [Deut. 32:36], "The Lord will judge His people."

Treasury of Scripture Knowledge

Summary

And mine eye shall not spare thee, neither will I have pity: but I will recompense thy ways upon thee, and thine abominations shall be in the midst of thee: and ye shall know that I am the LORD.

Bible References

But

Hebrews 10:30
For we know God, who said [Deut. 32:35], "Revenge belongs to me; I will pay back [for wrongdoing]." And again [Deut. 32:36], "The Lord will judge His people."