Cross reference
John 6:43
43 Therefore Jesus answered them, "Don't murmur among yourselves.
John 6:64
64 But there are some of you who don't believe." For Jesus knew from the beginning who they were who didn't believe, and who it was who would betray him.
Hebrews 4:13
13 There is no creature that is hidden from his sight, but all things are naked and laid open before the eyes of him with whom we have to do.
Matthew 16:8
8 Jesus, perceiving it, said, "Why do you reason among yourselves, you of little faith, 'because you have brought no bread?'
Mark 9:33
33 He came to Capernaum, and when he was in the house he asked them, "What were you arguing among yourselves on the way?"
John 16:19
19 Therefore Jesus perceived that they wanted to ask him, and he said to them, "Do you inquire among yourselves concerning this, that I said, 'A little while, and you won't see me, and again a little while, and you will see me?'