John 8:51

In truth I tell you, if any one lays my Message to heart, he will never really die."

John 11:25-26

"I am the Resurrection and the Life," said Jesus. "He that believes in me shall live, though he die;

Luke 2:26

It had been revealed to him by the Holy Spirit that he should not die until he had seen the Lord's Christ.

John 3:15-16

That every one who believes in him may have Immortal Life."

John 5:24

In truth I tell you that he who listens to my Message and believes him who sent me, has Immortal Life, and does not come under condemnation, but has already passed out of Death into Life.

John 8:55

And yet you have not learned to know him; but I know him; and, if I were to say that I do not know him, I should be a liar like you; but I do know him, and I lay his Message to heart.

John 15:20

Remember what I said to you--'A servant is not greater than his master.' If they have persecuted me, they will also persecute you; if they have laid my Message to heart, they will lay yours to heart also.

John 6:50

The Bread that comes down from Heaven is such that whoever eats of it will never die.

John 8:12

Jesus again addressed the people. "I am the Light of the World," he said. "He who follows me shall not walk in darkness, but shall have the Light of Life."

Hebrews 11:5

Faith led to Enoch's removal from earth, that he might not experience death. 'He could not be found because God had removed him.' For, before his removal, he was renowned as having pleased God;

Treasury of Scripture Knowledge

Summary

Verily, verily, I say unto you, If a man keep my saying, he shall never see death.

Bible References

If

John 3:15
That every one who believes in him may have Immortal Life."
John 5:24
In truth I tell you that he who listens to my Message and believes him who sent me, has Immortal Life, and does not come under condemnation, but has already passed out of Death into Life.
John 6:50
The Bread that comes down from Heaven is such that whoever eats of it will never die.
John 11:25
"I am the Resurrection and the Life," said Jesus. "He that believes in me shall live, though he die;

Keep

John 8:55
And yet you have not learned to know him; but I know him; and, if I were to say that I do not know him, I should be a liar like you; but I do know him, and I lay his Message to heart.
John 15:20
Remember what I said to you--'A servant is not greater than his master.' If they have persecuted me, they will also persecute you; if they have laid my Message to heart, they will lay yours to heart also.