Qur'an 29:6 · Al-Ankaboot

وَمَن جَٰهَدَ فَإِنَّمَا يُجَٰهِدُ لِنَفْسِهِۦٓ ۚ إِنَّ ٱللَّهَ لَغَنِىٌّ عَنِ ٱلْعَٰلَمِينَ

(6) And whoever strives only strives for [the benefit of] himself. Indeed, Allāh is Free from need of the worlds.