مَثَلُ الَّذِينَ يُنفِقُونَ أَمْوَالَهُمْ فِي سَبِيلِ اللَّهِ كَمَثَلِ حَبَّةٍ أَنبَتَتْ سَبْعَ سَنَابِلَ فِي كُلِّ سُنْبُلَةٍ مِّائَةُ حَبَّةٍ...

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.

— Source: Tazkirul Quran (Maulana Wahiduddin Khan) via Quran.com (2:261)