Mark 9:16

‘And he asked them, “What did you question with them?'

From Mark 9:14 we would see this as meaning that He asked the Scribes who had come with the crowd what they had been challenging His disciples about. However the fact that one of the crowd answers might suggest a question directed at the crowds with the Scribes seen as part of them, and the crowd seen as part of the questioning of the disciples through their leaders.