John 21:20

Then Peter, turning around, saw the disciple whom Jesus loved following (the one who also leaned on His breast at supper, and said, Lord, who is he who betrays You?)

John 21:7

Then that disciple whom Jesus loves said to Peter, It is the Lord! Then hearing that it is the Lord, Simon Peter girded on his coat (for he was naked), and cast himself into the sea.

John 20:2

Then she ran and came to Simon Peter, and to the other disciple whom Jesus loved, and said to them, They have taken away the Lord out of the tomb, and we do not know where they have laid Him.

John 13:23-26

But there was one of His disciples leaning upon Jesus' bosom, the one whom Jesus loved.

John 21:24

This is the disciple who testifies of these things and wrote these things. And we know that his testimony is true.

Treasury of Scripture Knowledge

Summary

Then Peter, turning about, seeth the disciple whom Jesus loved following; which also leaned on his breast at supper, and said, Lord, which is he that betrayeth thee?

Bible References

Seeth

John 21:7
Then that disciple whom Jesus loves said to Peter, It is the Lord! Then hearing that it is the Lord, Simon Peter girded on his coat (for he was naked), and cast himself into the sea.
John 20:2
Then she ran and came to Simon Peter, and to the other disciple whom Jesus loved, and said to them, They have taken away the Lord out of the tomb, and we do not know where they have laid Him.

Which

John 13:23
But there was one of His disciples leaning upon Jesus' bosom, the one whom Jesus loved.
John 20:2
Then she ran and came to Simon Peter, and to the other disciple whom Jesus loved, and said to them, They have taken away the Lord out of the tomb, and we do not know where they have laid Him.