Cross reference
John 13:22
22 The disciples looked at one another, perplexed about whom he spoke.
Luke 22:23
23 They began to question among themselves, which of them it was who would do this thing.
Matthew 26:22
22 They were exceedingly sorrowful, and each began to ask him, "It isn't me, is it, Lord?"
Mark 14:19
19 They began to be sorrowful, and to ask him one by one, "Surely not I?" And another said, "Surely not I?"
Genesis 42:1
1 Now Jacob saw that there was grain in Egypt, and Jacob said to his sons, "Why do you look at one another?"