1 John 1:2

1:2 and the life was revealed, and we have seen and testify and announce to you the eternal life that was with the Father and was revealed to us).

1 John 3:15

3:15 Everyone who hates his fellow Christian is a murderer, and you know that no murderer has eternal life residing in him.

1 John 5:13

Assurance of Eternal Life

5:13 I have written these things to you who believe in the name of the Son of God so that you may know that you have eternal life.