20 Then Peter, turning about, saw the disciple that Jesus loved, following, who also reclined at supper upon his breast, and said: Lord, who is he that delivers thee up?
John 21:20 Cross References - Anderson
John 13:23-26
23 There was reclining on the bosom of Jesus, one of his disciples, whom Jesus loved.
24 Then Simon Peter beckoned to this one, that he should inquire who it was of whom he spoke.
25 And he that was reclining on Jesus breast, said to him: Lord, who is it?
26 Jesus answered: It is he to whom I shall give this morsel after I have dipped it. And when he had dipped the morsel, he gave it to Judas Iscariot, the son of Simon.
John 20:2
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 know not where they have laid him.
John 21:7
7 Then that disciple whom Jesus loved said to Peter: It is the Lord. And when Simon Peter heard that it was the Lord, he girded on his outer coat, for he had on his inner garment only, and threw himself into the sea.
John 21:24
24 This is the disciple who testifies of these things, and who has written these things; and we know that his testimony is true.