The parable of those who spend their substance in the way of Allah is that of a grain of corn: it groweth seven ears, and each ear Hath a hundred grains. Allah giveth manifold increase to whom He pleaseth: And Allah careth for all and He knoweth all things. Al-Baqarah 2:261 ⧉
Tafsir:
Every act committed by man is like a seed planted in the ground. If one does something in order to be admired by others, it is as though one is planting a seed in the earth of this world. If, on the other hand, one acts in order to please God, then one has sown a seed in the everlasting fields of the Hereafter, where it will blossom and bear fruit. In this world, one seed produces a thousand grains of corn. Likewise in the harvest of the Hereafter, man will reap rewards far in excess of what he has sown.