Hebrews 10:30 in the King James Version
For we know him that hath said, Vengeance belongeth unto me, I will recompense, saith the Lord. And again, The Lord shall judge his people.
Context
29 How much worse punishment do you think he will be judged worthy of who has trodden under foot the Son of God, and has counted the blood of the covenant with which he was sanctified an unholy thing, and has insulted the Spirit of grace?
30 For we know him who said, “Vengeance belongs to me. I will repay,” says the Lord. Again, “The Lord will judge his people.”
31 It is a fearful thing to fall into the hands of the living God.