Mark 14:19

They began to be sorrowful and to say to him one after another, "Is it I?"

And they were very sorrowful and began to say to him one after another, "Is it I, Lord?"

But behold, the hand of him who betrays me is with me on the table.

The disciples looked at one another, uncertain of whom he spoke.

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?

And they were very sorrowful and began to say to him one after another, "Is it I, Lord?"

But behold, the hand of him who betrays me is with me on the table.

The disciples looked at one another, uncertain of whom he spoke.

And they were very sorrowful and began to say to him one after another, "Is it I, Lord?"

And they began to question one another, which of them it could be who was going to do this.