John 13:23 WEB

²¹  When Jesus had said this, he was troubled in spirit, and testified, 'Most assuredly I tell you that one of you will betray me.'

²²  The disciples looked at one another, perplexed about whom he spoke.

²³  One of his disciples, whom Jesus loved, was at the table, leaning against Jesus' breast.

²⁴  Simon Peter therefore beckoned to him, and said to him, 'Tell us who it is of whom he speaks.'

²⁵  He, leaning back, as he was, on Jesus' breast, asked him, 'Lord, who is it?'