Revelation 2:11

He who has an ear, let him hear what the Spirit says to the churches. He who overcomes will not be hurt at all by the second death.'

Revelation 2:7

He who has an ear, let him hear what the Spirit says to the churches. To him who overcomes, I will give the right to eat from the tree of life, which is in the Paradise of God.'

Revelation 20:6

Blessed and holy is the one who has a part in the first resurrection; over these the second death has no power, but they will be priests of God and of Christ and will reign with him for a thousand years.

Revelation 20:14

Then death and Hades were thrown into the lake of fire. This is the second death, the lake of fire.

Revelation 21:8

But as for the cowardly, the unbelieving, the immoral, as for murderers, fornicators, sorcerers, idolaters, and all liars, their lot will be in the lake that burns with fire and sulfur, which is the second death."

Revelation 2:17

He who has an ear, let him hear what the Spirit says to the churches. To him who overcomes I will give some of the hidden manna. And I will give him a white stone, with a new name written on the stone which no one knows except him who receives it.'

Revelation 13:9

If anyone has an ear, 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
He who has an ear, let him hear what the Spirit says to the churches. To him who overcomes, I will give the right to eat from the tree of life, which is in the Paradise of God.'
Revelation 13:9
If anyone has an ear, let him hear.

The second

Revelation 20:6
Blessed and holy is the one who has a part in the first resurrection; over these the second death has no power, but they will be priests of God and of Christ and will reign with him for a thousand years.
Revelation 21:8
But as for the cowardly, the unbelieving, the immoral, as for murderers, fornicators, sorcerers, idolaters, and all liars, their lot will be in the lake that burns with fire and sulfur, which is the second death."

General references

Matthew 11:15
He who has ears to hear, let him hear.
Matthew 13:9
He who has ears, let him hear."
Mark 4:23
If anyone has ears to hear, let him hear."
Mark 7:16
(...)
1 Corinthians 3:14
If any man's work which he has built on it survives, he will receive a reward.
Hebrews 10:15
And the Holy Spirit also bears witness to us; for after saying,
Revelation 3:22
He who has an ear, let him hear what the Spirit says to the churches.'"
Revelation 13:9
If anyone has an ear, let him hear.