2 Corinthians 8:15

The saints, with their hope in the world to come, have more than those who appear to be rich in this world. But both will be made equal, because those who give of their wealth to help the saints now will be helped by them at some future time, when they are in need.

Now this happened in the case of the manna. For both they that gathered more, and they that gathered less, were found to have the same quantity, God in this way punishing insatiableness. And this he said at once both to alarm them by what then happened, and to persuade them never to desire to have more nor to grieve at having less. And this one may see happening now in things of this life not in the manna only. For if we all fill but one belly, and live the same length of time, and clothe one body; neither will the rich gain aught by his abundance nor the poor lose aught by his poverty.

How will there be equality? If both you and they mutually share your surpluses with one another and fill each other's deficiencies. But what kind of equality is it to give spiritual things in return for material things? Here, of course, the equality is not in relation to the value or pricelessness of what is given and received in return, but in relation to surplus and lack: you give from your surplus, and they give from their surplus; and again: you receive what you were in need of, and they receive what they are in need of. This equality relates entirely to the present time, but what belongs to the future age has a great advantage over what is given now. Therefore, humble yourselves, O rich, because in things that are permanent and imperishable, the poor surpass you. He brings as an example what happened during the gathering of manna, to show how equality comes about. Namely: when a rich man, having much, gives his surplus to the one who has little, then he himself does not have excess, nor does the one who had little have any lack in what he received from him. The same is true of boldness before God. At the same time, he also suggests something greater, showing the rich that just as during the gathering of manna all—both those who gathered more and those who gathered less—found an equal measure for themselves, by which God punished their insatiability, so also now one should not desire more.

Then he confirms this with an authority; hence he says, "As it is written," namely in Ex. (16:18): "He who gathered much," i.e., had collected more manna than an omer, "had nothing over," i.e., did not have more than his sufficiency; "and he who gathered little had no lack," i.e., he did not fall short of it, because all had an equal abundance, as it says in Ex. (16:18). And so neither he who had collected more had more, nor he who had prepared less, discovered less.