1 Corinthians 16:2

"On the first day of the week," that is, the Lord's day, "let each one of you lay by him in store, as he may prosper." Mark how he exhorts them even from the time: for indeed the day was enough to lead them to almsgiving. Wherefore "call to mind," saith he, "what ye attained to on this day: how all the unutterable blessings, and that which is the root and the beginning of our life took place on this day. But not in this regard only is the season convenient for a zealous benevolence, but also because it hath rest and immunity from toils: the souls when released from labors becoming readier and apter to show pity. Moreover, the communicating also on that day in Mysteries so tremendous and immortal instils great zealousness. On it, accordingly, "let each one of you," not merely this or that individual, but "each one of you," whether poor or rich, woman or man, slave or free, "lay by him store." He said not, "Let him bring it the church," lest they might feel ashamed because of the smallness of the sum; but "having by gradual additions swelled his contribution, let him then produce it, when I am come but for the present lay it up," saith he, "at home, and make thine house a church; thy little box a treasury. Become a guardian sacred wealth, a self-ordained steward of the poor. Thy benevolent mind assigns to thee this priesthood." Now I am aware that many of this congregation will again find fault with me when treat of these subjects, and say, "Be not, I beseech you, be not harsh and disagreeable to four audience. Make allowances for their disposition; give way to the mind of the hearers. For in this case you really do put us to shame; you make us blush." But I may not endure such words: since neither was Paul ashamed to be continually troublesome upon such points as these and to speak words such as mendicants use. I grant indeed that if I said, "give it me," and "lay it up in my house," there might perchance be something to be ashamed of in what I said: hardly however even in that case; for "they who wait upon the altar," we read, "have their portion with the altar." However, some one perhaps might find fault as if he were framing an argument for his own interest. But now it is for the poor that I make my supplication; nay, not so much for the poor, as for your sake who bestow the gift. But that my argument may both be more forcible and more effective, I will take Paul for my comrade, and like him will discourse and say, "Let each one of you lay by him in store, as he may prosper." Now observe also how he avoids being burdensome. He said not, "so much," or "so much," but "as he may prosper," whether much or little. Neither said he, "what any one may have gained," but, "as he may prosper:" signifying that the supply is of God. And not only so, but also by his not enjoining them to deposit all at once, he makes his counsel easy: since the gathering little by little hinders all perception of the burden and the cost. Here you see the reason too for his not enjoining them to produce it immediately, but giving them a long day; whereof adding the cause, he saith. "That there be no gatherings when I come:" which means, that ye may not when the season is come for paying in contributions just then be compelled to collect them. And this too in no ordinary degree encouraged them again: the expectation of Paul being sure to make them more earnest.