Theophylact of Ohrid — as excerpted in the Catena Aurea on Luke 9:1-6

“Some also understand by the Apostles not carrying scrip, nor staff, nor two coats, that they must not lay up treasures, (which a scrip implies, collecting many things,) nor be angry and of a quarrelsome spirit, (which the staff signifies,) nor be false and of a double heart, (which is meant by the two coats.)”