Luke 12:5

But I will show you whom you must fear: Fear him, who after he kills has power to cast into hell. Yea, I say unto you, Fear him.

Matthew 10:28

Be not afraid of those who kill the body, but are not able to kill the soul: but fear ye, rather him who is able to destroy both soul and body in hell.

2 Peter 2:4

For if God spared not the angels who sinned, but having sent them down to hell, committed them to chains of darkness to be kept unto judgment;

Matthew 5:22

but I say unto you that every one being angry with his brother, shall be in danger of the judgment; and whosoever may say to his brother, Thou scoundrel, shall be in danger of the council; and whosoever may say, Thou fool, shall be liable unto a hell of fire.

Matthew 25:41

Then will He also say unto those on the left, Depart from me, ye cursed, into eternal fire which has been prepared for the devil and his angels.

Matthew 25:46

And these shall go away into eternal punishment: and the righteous into eternal life.

Mark 13:23

But you see: behold, I have foretold you all things.

1 Thessalonians 4:6

that one should overreach and defraud his brother in a business transaction: because the Lord is the avenger concerning these things, as we indeed before told you and witnessed to you.

Hebrews 10:31

It is a fearful thing to fall into the hands of the living God.

Revelation 14:7

saying with a great voice, Fear God, and give glory to him; because the hour of his judgment is come: and worship him who made the heaven, and the earth, and the sea, and the fountains of the waters.

Revelation 15:4

Who may not fear, O Lord, and will not glorify thy name? because thou alone art holy; because all the nations shall come and worship before thee; because thy righteous acts have been made manifest.

Revelation 20:14

And death and Hades were cast into the lake of fire. This is the second death, the lake of fire.

Treasury of Scripture Knowledge

Summary

But I will forewarn you whom ye shall fear: Fear him, which after he hath killed hath power to cast into hell; yea, I say unto you, Fear him.

Bible References

Forewarn

Mark 13:23
But you see: behold, I have foretold you all things.
1 Thessalonians 4:6
that one should overreach and defraud his brother in a business transaction: because the Lord is the avenger concerning these things, as we indeed before told you and witnessed to you.

Power

Matthew 10:28
Be not afraid of those who kill the body, but are not able to kill the soul: but fear ye, rather him who is able to destroy both soul and body in hell.
Matthew 25:41
Then will He also say unto those on the left, Depart from me, ye cursed, into eternal fire which has been prepared for the devil and his angels.
2 Peter 2:4
For if God spared not the angels who sinned, but having sent them down to hell, committed them to chains of darkness to be kept unto judgment;
Revelation 20:14
And death and Hades were cast into the lake of fire. This is the second death, the lake of fire.