They had been discussing with one another that they didn’t have any bread.
Jesus warned them, “Be careful! Watch out for the yeast of the Pharisees and the yeast of Herod!”
Jesus knew what they were saying and asked them, “Why are you discussing the fact that you don’t have any bread? Don’t you understand yet? Don’t you catch on? Are your minds closed?
They talked about this among themselves. They said, “If we say, ‘from heaven,’ he will ask, ‘Why didn’t you believe him?’
A discussion started among them about who would be the greatest.