Augustine of Hippo
Catena Aurea · Lukasevangelium 9
Then he called his twelve disciples together, and gave them power and authority over all devils, and to cure diseases. And he sent them to preach the kingdom of God, and to heal the sick. And he said unto them, Take nothing for your journey, neither staves, nor scrip, neither bread, neither money; neither have two coats apiece. And whatsoever house ye enter into, there abide, and thence depart. And whosoever will not receive you, when ye go out of that city, shake off the very dust from your feet for a testimony against them. And they departed, and went through the towns, preaching the Gospel, and healing every where.
(de Con. l. 2. c. 30.) Or, the Lord did not wish the disciples to possess and carry with them these things, not that they were not necessary to the support of this life, but because He sent them thus to shew that these things were due to them from those believers to whom they announced the Gospel, that so they might neither possess security, nor carry about with them the necessaries of this life, either great or little. He has therefore, according to Mark, excluded all except a staff, shewing that the faithful owe every thing to their ministers who require no superfluities. But this permission of the staff He has mentioned by name, when He says, They should take nothing in the way, but a staff only.