Theophylact of Ohrid — as excerpted in the Catena Aurea on Mark 9:14-29

“After He had shewn His glory in the mount to the three disciples, He returns to the other disciples, who had not come up with Him into the mount; wherefore it is said, And when he came to his disciples, he saw a great multitude about them, and the Scribes questioning with them. For the Pharisees, catching the opportunity of the hour when Christ was not present, came up to them, to try to draw them over to themselves.”