John Gill Commentary Luke 22:23

"And they began to question among themselves, which of them it was that should do this thing." — Luke 22:23 (ASV)

And they began to inquire among themselves Two days before, at the supper in Bethany, when the same thing was hinted to them, they looked at one another, (John 13:22) as persons in the utmost surprise and consternation, not being able, for a while, either to speak to Christ, or one another; but now they inquired among themselves, and of Christ likewise, (Matthew 26:21) which of them it was that should do this thing ; so barbarous, shocking, and horrible.