John 13:21-26 KJV
When Jesus had thus said, he was troubled in spirit, and testified, and said, Verily, verily, I say unto you, that one of you shall betray me.
Then the disciples looked one on another, doubting of whom he spake.
Now there was leaning on Jesus' bosom one of his disciples, whom Jesus loved.
Simon Peter therefore beckoned to him, that he should ask who it should be of whom he spake.
He then lying on Jesus' breast saith unto him, Lord, who is it?
Jesus answered, He it is, to whom I shall give a sop, when I have dipped it. And when he had dipped the sop, he gave it to Judas Iscariot, the son of Simon.