John Chrysostom
Catena Aurea · Lukasevangelium 14
Then said he also to him that bade him, When thou makest a dinner or a supper, call not thy friends, nor thy brethren, neither thy kinsmen, nor thy rich neighbours; lest they also bid thee again, and a recompence be made thee. But when thou makest a feast, call the poor, the maimed, the lame, the blind: And thou shalt be blessed; for they cannot recompense thee: for thou shalt be recompensed at the resurrection of the just.
Let us not then bestow kindness on others under the hope of return. For this is a cold motive, and hence it is that such a friendship soon vanishes. But if you invite the poor, God, who never forgets, will be your debtor, as it follows, But when ye make a feast, call the poor, the maimed, the lame, and the blind.