Luke 12:5

But I will shew you whom ye shall fear: fear him, who after he hath killed, hath power to cast into hell: yea, I say to you, fear him.

Matthew 10:28

And be not afraid of them who kill the body, but are not able to kill the soul; but rather be afraid of him who is able to destroy both soul and body in hell.

2 Peter 2:4

For if God spared not the angels that sinned, but cast them down to hell, delivered them to chains of darkness,

Matthew 5:22

But I say unto you, That whosoever is angry with his brother, shall be liable to the judgment; and whosoever shall say to his brother, Raca, shall be liable to the council; but whosoever shall say, Thou fool, shall be liable to hell-fire.

Matthew 25:41

Then shall he say also to them on his left-hand, Depart from me, ye cursed into the everlasting fire, prepared for the devil and his angels.

Matthew 25:46

And these shall go away into everlasting punishment; but the righteous into life everlasting.

Mark 13:23

But take ye heed: behold, I have foretold you all things.

1 Thessalonians 4:6

That none circumvent or defraud his brother in this matter, because the Lord is an avenger of all these things, as we have also told you before and testified.

Hebrews 10:31

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

Revelation 14:7

and tribe, and tongue, and people, Saying with a loud voice, Fear God and give glory to him, for the hour of his judgment is come: and worship him that made the heaven, and the earth, and the sea, and fountains of water.

Revelation 15:4

Who would not fear thee, O Lord, and glorify thy name? For thou only art gracious: for all the nations shall come and worship before thee: for thy judgments are made manifest.

Revelation 20:14

And death and hades were cast into the lake of fire: this is the second death.

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 take ye heed: behold, I have foretold you all things.
1 Thessalonians 4:6
That none circumvent or defraud his brother in this matter, because the Lord is an avenger of all these things, as we have also told you before and testified.

Power

Matthew 10:28
And be not afraid of them who kill the body, but are not able to kill the soul; but rather be afraid of him who is able to destroy both soul and body in hell.
Matthew 25:41
Then shall he say also to them on his left-hand, Depart from me, ye cursed into the everlasting fire, prepared for the devil and his angels.
2 Peter 2:4
For if God spared not the angels that sinned, but cast them down to hell, delivered them to chains of darkness,
Revelation 20:14
And death and hades were cast into the lake of fire: this is the second death.