John, however, does not record the individual inquiries but describes how John, leaning on Jesus' chest, inquired at Peter's request and received the response, “The one to whom I will dip a piece of bread and give it to.” This conclusion belongs solely to John's narrative.
It is clear that the Hebrew accounts present various aspects of this event: Luke focuses solely on the prediction of the traitor and Christ's admonition, alongside the disciples' initial confusion and discussions among themselves. In contrast, Matthew and Mark highlight the disciples' subsequent questioning of Jesus, along with a general but vague indication of the traitor's identity and a warning directed at him. The fulfilment of this instruction may have coincided with the communication to John. As Judas attempts to assert his boldness, he asks the Lord, “Is it not I, Rabbi?” to which the Lord quietly affirms, “Yes, you are.” The other disciples likely did not hear this final response but understood the Lord's words about “he who put his hand in the dish with me” in a broad sense, recognizing it as referring to “one of the twelve” or “the hand of him who betrays me.”
Following this, Peter gestures to John, urging him to ask Jesus for the identity of the betrayer. If this inquiry occurred during the section of the Supper when the host was distributing the broken bread to those present, the exposure of Judas as the traitor may have unfolded as follows: Jesus informed John, “He to whom I shall give a piece of bread after I have dipped it.” This was the precise moment He was to serve Judas his portion of bread. Judas, in a state of agitation and attempting to conceal his turmoil, reached for the dish too soon, as the Lord was already extending His hand toward the dish with the piece of bread meant for him.