John Chrysostom

"Or I only and Barnabas, have we not a right to forbear working?" See his humility of mind and his soul pure from envy, how he takes care not to conceal him whom he knew to be a partaker with himself in this perfection. For if the other things be common, how is not this common? Both they and we are apostles and are free, and have seen Christ, and have exhibited the works of Apostles. Therefore we likewise have a right both to live without working and to be supported by our disciples.

Homily on 1 Corinthians 21 ↗

Theophylact of Ohrid

That is, do we really not have the authority to live without working and to be supported at the expense of our disciples, without laboring? He did not fail to mention Barnabas either, who, as he knew, was also scrupulous in this regard; for he lived by his own labor.

Commentary on 1 Corinthians ↗

Augustine of Hippo

"Or I only and Barnabas, have we not power to forbear working?" Lo, he hath taken away all doubt even from the slowest hearts, that they may understand of what working he speaks. For to what end saith he, "Or I only and Barnabas, have we not power to forbear working?" but for that all evangelists and ministers of God's word had power received of the Lord, not to work with their hands, but to live by the Gospel, working only spiritual works in preaching of the kingdom of heaven and edifying of the peace of the Church? …

Of The Work Of Monks 8 ↗