Hebrews 10:28-30

28Anyone who rejected the law of Moses died without mercy on the testimony of two or three witnesses. 29How much more severely do you think someone deserves to be punished who has trampled the Son of God underfoot, who has treated as an unholy thing the blood of the covenant that sanctified them, and who has insulted the Spirit of grace? 30For we know him who said, “It is mine to avenge; I will repay,” and again, “The Lord will judge his people.”