Cross reference
John 13:22
22 the disciples were looking, therefore, one at another, doubting concerning whom he speaketh.
Luke 22:23
23 And they began to reason among themselves, who then of them it may be, who is about to do this thing.
Matthew 26:22
22 And being grieved exceedingly, they began to say to him, each of them, `Is it I, Sir?'
Mark 14:19
19 And they began to be sorrowful, and to say to him, one by one, `Is it I?' and another, `Is it I?'
Genesis 42:1
1 And Jacob seeth that there is corn in Egypt, and Jacob saith to his sons, `Why do you look at each other?'