The Epistle of Barnabas
Barnabae epistula
Barnabas. The Apostolic Fathers with an English Translation In Two Volumes. Vol. I. Lake, Kirsopp, translator. Cambridge, MA: Harvard University Press; London: William Heinemann Ltd. 1912.
But to us he says, Behold this is the fast which I chose, saith the Lord, loose every bond of wickedness, set loose the fastenings of harsh agreements, send away the bruised in forgiveness, and tear up every unjust contract, give to the hungry thy bread, and if thou seest a naked man clothe him, bring the homeless into thy house, and if thou seest a humble man, despise him not, neither thou nor any of the household of thy seed.
Then shall thy light break forth as the dawn, and thy robes shall rise quickly, and thy righteousness shall go before thee, and the glory of God shall surround thee.