Hebrews 10:28-29

Anyone who refused to obey the law of Moses was found guilty from the proof given by two or three witnesses. He was put to death without mercy. So what do you think should be done to those who do not respect the Son of God, who look at the blood of the agreement that made them holy as no different from others’ blood, who insult the Spirit of God’s grace? Surely they should have a much worse punishment.