If.

John 3:15, 16
that everyone who believes in Him may have eternal life. . . .

John 5:24
Truly, truly, I tell you, whoever hears My word and believes Him who sent Me has eternal life and will not come under judgment. Indeed, he has crossed over from death to life.

John 6:50
This is the bread that comes down from heaven, so that anyone may eat of it and not die.

John 11:25, 26
Jesus said to her, "I am the resurrection and the life. He who believes in Me will live, even though he dies. . . .

keep.

John 8:55
You do not know Him, but I know Him. If I said I did not know Him, I would be a liar like you. But I do know Him, and I keep His word.

John 15:20
Remember the word that I spoke to you: 'No servant is greater than his master.' If they persecuted Me, they will persecute you as well; if they kept My word, they will keep yours as well.

see.

John 8:12
Once again, Jesus spoke to the people and said, "I am the light of the world. Whoever follows Me will never walk in the darkness, but will have the light of life."

Psalm 89:48
What man can live and never see death? Can he deliver his soul from the power of Sheol? Selah

Luke 2:26
The Holy Spirit had revealed to him that he would not see death before he had seen the Lord's Christ.