Matthew 26:22

And they were exceedingly grieved, and said to Him, every one of them, Lord, is it I?

Mark 14:19-20

And they were grieved, and said to Him one by one, Is it I?

Luke 22:23

And they began to enquire among themselves, which of them it was that should do it.

John 13:22-25

The disciples therefore looked on one another, doubting of whom He spake.

John 21:17

He saith unto him, Feed my sheep. He saith unto him the third time, Simon son of Jonas, dost thou love me? Peter was grieved, that He said to him the third time, Dost thou love me? And he said unto Him, Lord, Thou knowest all things, Thou knowest that I love Thee. Jesus saith unto him, Feed my sheep.

Treasury of Scripture Knowledge did not add