1 John 5:13

9 Even if we accept human testimony, the testimony of God is greater. For this is the testimony that God has given about His Son.

10 Whoever believes in the Son of God has this testimony within him; whoever does not believe God has made Him out to be a liar, because he has not believed in the testimony that God has given about His Son.

11 And this is that testimony: God has given us eternal life, and this life is in His Son.

12 Whoever has the Son has life; whoever does not have the Son of God does not have life.

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.

14 And this is the confidence that we have before Him: If we ask anything according to His will, He hears us.

15 And if we know that He hears us in whatever we ask, we know that we already possess what we have asked of Him.

16 If anyone sees his brother committing a sin not leading to death, he should ask God, who will give life to those who commit this kind of sin. There is a sin that leads to death; I am not saying he should ask regarding that sin.

17 All unrighteousness is sin, yet there is sin that does not lead to death.

Read all of 1 John 5