John 20:31

But these are written, that ye might believe that Jesus is the Christ, the Son of God; and that believing ye might have life through his name.

John 20:31 · King James Version

In other versions

but these are written, that ye may believe that Jesus is the Christ, the Son of God; and that believing ye may have life in his name.
ASV
But these are recorded, so that you may have faith that Jesus is the Christ, the Son of God, and so that, having this faith you may have life in his name.
BBE
but these are written that ye may believe that Jesus is the Christ, the Son of God, and that believing ye might have life in his name.
DBY
but these are written, that you may believe that Jesus is the Christ, the Son of God, and that believing you may have life in his name.
WEB
and these have been written that ye may believe that Jesus is the Christ, the Son of God, and that believing ye may have life in his name.'
YLT
But these are written, that all of you might believe that Jesus is the Christ, the Son of God; and that believing all of you might have life through his name.
ENG
But these are written, that ye may believe that Jesus is the Christ, the Son of God, and that believing ye may have life through his name.
WBT
But these are written so that you may believe that Jesus is the Christ, the Son of God, and that by believing you may have life in His name.
BSB

²⁹Jesus saith unto him, Thomas, because thou hast seen me, thou hast believed: blessed are they that have not seen, and yet have believed.

³⁰And many other signs truly did Jesus in the presence of his disciples, which are not written in this book:

³¹But these are written, that ye might believe that Jesus is the Christ, the Son of God; and that believing ye might have life through his name.