John 21:24

This is the disciple which testifieth of these things, and wrote these things: and we know that his testimony is true.

This is the disciple who testifies about these things, and wrote these things. We know that his witness is true.

This is the disciple that beareth witness of these things, and wrote these things: and we know that his witness is true.

this is the disciple who is testifying concerning these things, and he wrote these things, and we have known that his testimony is true.

This is the disciple who testifies to these things and who has written them down. And we know that his testimony is true.