It is one of the twelve apostles (Mk 14:20-14:20)

“Jesus said to them.

‘It is one of the twelve!

It is the one

Who is dipping

Into the bowl

With me.’”

 

ὁ δὲ εἶπεν αὐτοῖς Εἷς τῶν δώδεκα, ὁ ἐμβαπτόμενος μετ’ ἐμοῦ εἰς τὸ τρύβλιον.

 

This is similar to Matthew, chapter 26:22, and Luke, chapter 22:21, where Jesus’ hand was on the table.  John, chapter 13:26-27, has the dipping of the hand in the bowl for bread in a conversation between Jesus, Peter, and Judas.  Here, Mark said that Jesus told his apostles (ὁ δὲ εἶπεν αὐτοῖς) that clearly the betrayer was one of the 12 apostles (Εἷς τῶν δώδεκα).  In fact, he said that it was one of those who were dipping into the bowl or the deep platter with him (ὁ ἐμβαπτόμενος μετ’ ἐμοῦ εἰς τὸ τρύβλιον).  There was no question that the betrayer was among them in this room.

The disciples prepare for the Passover (Mt 26:19-26:19)

“The disciples did

As Jesus

Had directed them.

They prepared

The Passover meal.”

 

καὶ ἐποίησαν οἱ μαθηταὶ ὡς συνέταξεν αὐτοῖς ὁ Ἰησοῦς, καὶ ἡτοίμασαν τὸ πάσχα.

 

This is similar to Mark, chapter 14:16, and Luke, chapter 22:13, but with a little more elaboration there.  These disciples did (καὶ ἐποίησαν οἱ μαθηταὶ) as Jesus had directed them to do (ὡς συνέταξεν αὐτοῖς ὁ Ἰησοῦς).  They prepared the Passover meal (καὶ ἡτοίμασαν τὸ πάσχα).  Nothing unusual here, the disciples followed the orders of Jesus and had this room ready for the Passover celebration.