Revelation 2:11

Let the one having ears, hear what the Spirit says to the churches; The one conquering can never be hurt by the second death.

Revelation 2:7

Let the one having ears, hear what the Spirit says to the churches; to him who conquers I will give to eat of the tree of life, which is in the Paradise of God.

Revelation 20:6

Blessed and holy is the one having part in the first resurrection: over these the second death has no authority, but they shall be priests of God and of Christ, and shall reign with him a thousand years.

Revelation 20:14

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

Revelation 21:8

But to the cowardly, and unbelieving, and the abominable, and the murderers, and the fornicators, and the sorcerers, and the idolaters, and all liars, shall be their part in the lake which burns with fire and brimstone, which is the second death.

Revelation 2:17

Let the one having ears hear what the Spirit says to the churches; unto the one conquering will I give to him of the hidden manna, and I will give him a white stone, and on the stone my new name having been written, which no one knows but the one receiving it.

Revelation 13:9

if any one has ears, let him hear.

Treasury of Scripture Knowledge

Summary

He that hath an ear, let him hear what the Spirit saith unto the churches; He that overcometh shall not be hurt of the second death.

Bible References

That hath

Revelation 2:7
Let the one having ears, hear what the Spirit says to the churches; to him who conquers I will give to eat of the tree of life, which is in the Paradise of God.
Revelation 13:9
if any one has ears, let him hear.

The second

Revelation 20:6
Blessed and holy is the one having part in the first resurrection: over these the second death has no authority, but they shall be priests of God and of Christ, and shall reign with him a thousand years.
Revelation 21:8
But to the cowardly, and unbelieving, and the abominable, and the murderers, and the fornicators, and the sorcerers, and the idolaters, and all liars, shall be their part in the lake which burns with fire and brimstone, which is the second death.

General references

Matthew 11:15
Let the one having ears to hear, hear.
Matthew 13:9
Let him that hath ears to hear, hear.
Mark 4:23
If any one has ears to hear, let him hear.
Mark 7:16
If any one has ears to hear, let him hear.
1 Corinthians 3:14
And if the work of any one which he builds, abides, he will receive a reward:
Hebrews 10:15
And the Holy Ghost truly does witness to us: for afterward he said,
Revelation 3:22
Let the one having ears hear what the Spirit says to the churches.
Revelation 13:9
if any one has ears, let him hear.