Cross reference
John 13:22
22 Then the disciples looked one on another, doubting of whom he spake.
Luke 22:23
23 And they began to enquire among themselves, which of them it was that should do this thing.
Matthew 26:22
22 And they were exceeding sorrowful, and began every one of them to say unto him, Lord, is it I?
Mark 14:19
19 And they began to be sorrowful, and to say unto him one by one, Is it I? and another said, Is it I?
Genesis 42:1
1 Now when Jacob saw that there was corn in Egypt, Jacob said unto his sons, Why do ye look one upon another?