Theophylact of Ohrid — as excerpted in the Catena Aurea on Luke 9:46-50

“Now it seems that this feeling was excited by the circumstance of their not being able to cure the demoniac. And while they were disputing thereupon, one said, It was not owing to my weakness, but another’s, that he could not be cured; and so thereby was kindled a strife among them, which was the greatest.”