Mark 14:19

They began to be sorrowful and to say to him, one after another, "Surely, not I?"

In deep distress they began to ask him, each in turn, "It is not I, is it, Master?"

"But behold, the hand of my betrayer is at the table with me!

Then the disciples began looking at one another, wondering which one of them he meant.

Treasury of Scripture Knowledge

And they began to be sorrowful, and to say unto him one by one, Is it I? and another said, Is it I?

In deep distress they began to ask him, each in turn, "It is not I, is it, Master?"

"But behold, the hand of my betrayer is at the table with me!

Then the disciples began looking at one another, wondering which one of them he meant.

In deep distress they began to ask him, each in turn, "It is not I, is it, Master?"

And they began to question among themselves which of them it could be who was going to do such a thing.