Ecclesiastes 11:1

Solomon had often, in this book, pressed it upon rich people to take the comfort of their riches themselves; here he presses it upon them to do good to others with them and to abound in liberality to the poor, which will, another day, abound to their account. Observe, I. How the duty itself is recommended to us, Ecc 11:1. 1. Cast thy bread upon the waters, thy bread-corn upon the low places (so some understand it), alluding to the husbandman, who goes forth, bearing precious seed, sparing bread-corn from his family for the seedness, knowing that without that he can have no harvest another year; thus the charitable man takes from his bread-corn for seed-corn, abridges himself to supply the poor, that he may sow beside all waters (Isa 32:20), because as he sows so he must reap, Gal 6:7. We read of the harvest of the river, Isa 23:3. Waters, in scripture, are put for multitudes (Rev 16:5), and there are multitudes of poor (we do not want objects of charity); waters are put also for mourners: the poor are men of sorrows. Thou must give bread, the necessary supports of life, not only give good words but good things, Isa 58:7. It must be thy bread, that which is honestly got; it is no charity, but injury, to give that which is none of our own to give; first do justly, and then love mercy.

— Matthew Henry's Concise Commentary (public domain)