Surah Al-'Ankabut 29:6
وَمَن جَٰهَدَ فَإِنَّمَا يُجَٰهِدُ لِنَفْسِهِۦٓ ۚ إِنَّ ٱللَّهَ لَغَنِىٌّ عَنِ ٱلْعَٰلَمِينَ ٦
EnglishSahih International
And whoever strives only strives for [the benefit of] himself. Indeed, Allah is free from need of the worlds.