مَّثَلُ ٱلَّذِينَ يُنفِقُونَ أَمْوَٰلَهُمْ فِى سَبِيلِ ٱللَّهِ كَمَثَلِ حَبَّةٍ أَنۢبَتَتْ سَبْعَ سَنَابِلَ فِى كُلِّ سُنۢبُلَةٍۢ مِّا۟ئَةُ حَبَّةٍۢ ۗ وَٱللَّهُ يُضَٰعِفُ لِمَن يَشَآءُ ۗ وَٱللَّهُ وَٰسِعٌ عَلِيمٌ
The example of those who spend their wealth in the way of Allah is like a seed [of grain] which grows seven spikes; in each spike is a hundred grains. And Allah multiplies [His reward] for whom He wills. And Allah is all-Encompassing and Knowing.
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.