Hebrews 10:23-31 New Revised Standard Version (NRSV)
23 Let us hold fast to the confession of our hope without wavering, for he who has promised is faithful. 24 And let us consider how to provoke one another to love and good deeds, 25 not neglecting to meet together, as is the habit of some, but encouraging one another, and all the more as you see the Day approaching.
26 For if we willfully persist in sin after having received the knowledge of the truth, there no longer remains a sacrifice for sins, 27 but a fearful prospect of judgment, and a fury of fire that will consume the adversaries. 28 Anyone who has violated the law of Moses dies without mercy “on the testimony of two or three witnesses.” 29 How much worse punishment do you think will be deserved by those who have spurned the Son of God, profaned the blood of the covenant by which they were sanctified, and outraged the Spirit of grace? 30 For we know the one who said, “Vengeance is mine, I will repay.” And again, “The Lord will judge his people.” 31 It is a fearful thing to fall into the hands of the living God.