Hebrews 10:26-31 NKJV
For if we sin willfully after we have received the knowledge of the truth, there no longer remains a sacrifice for sins,
 but a certain fearful expectation of judgment, and fiery indignation which will devour the adversaries.
 Anyone who has rejected Moses’ law dies without mercy on the testimony of two or three witnesses.
 Of how much worse punishment, do you suppose, will he be thought worthy who has trampled the Son of God underfoot, counted the blood of the covenant by which he was sanctified a common thing, and insulted the Spirit of grace?
 For we know Him who said, “Vengeance is Mine, I will repay,” says the Lord. And again, “The LORD will judge His people.”
 It is a fearful thing to fall into the hands of the living God.
Hebrews 10:36-39 NKJV
For you have need of endurance, so that after you have done the will of God, you may receive the promise:
 “For yet a little while, And He who is coming will come and will not tarry.
 Now the just shall live by faith; But if anyone draws back, My soul has no pleasure in him.”
 But we are not of those who draw back to perdition, but of those who believe to the saving of the soul.
Revelation 21:6-8 KJV
And he said unto me, It is done. I am Alpha and Omega, the beginning and the end. I will give unto him that is athirst of the fountain of the water of life freely.
 He that overcometh shall inherit all things; and I will be his God, and he shall be my son.
 But the fearful, and unbelieving, and the abominable, and murderers, and whoremongers, and sorcerers, and idolaters, and all liars, shall have their part in the lake which burneth with fire and brimstone: which is the second death.