20 Peter turned and* saw the disciple whom Jesus loved following them* (who also leaned back on his chest at the dinner and said, "Lord, who is the one betraying you?")
John 21:20 Cross References - LEB
John 13:23-26
23 One of his disciples—the one whom Jesus loved—was reclining ⌊close beside⌋* Jesus.
24 So Simon Peter gestured for this one to inquire who it was about whom he was speaking.
25 He leaned back* accordingly against Jesus' chest and* said to him, "Lord, who is it?"
26 Jesus replied, "It is he to whom I dip the piece of bread and give it* to him." Then after* dipping the piece of bread, he gave it** to Judas son of Simon Iscariot.
John 20:2
2 So 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 from the tomb and we do not know where they have put him!"
John 21:7
7 Then that disciple whom Jesus loved said to Peter, "It is the Lord!" So Simon Peter, when he* heard that it was the Lord, tied around himself his outer garment (for he was naked)* and threw himself into the sea.
John 21:24
24 This is the disciple who is testifying about these things, and who has written down these things. And we know that his testimony is true.