John 21:19-21

Young's Literal Translation

¹⁹ and this he said, signifying by what death he shall glorify God; and having said this, he saith to him, `Be following me.'

²⁰ And Peter having turned about doth see the disciple whom Jesus was loving following, (who also reclined in the supper on his breast, and said, `Sir, who is he who is delivering thee up?')

²¹ Peter having seen this one, saith to Jesus, `Lord, and what of this one?'