Surah Al-'Ankabut — Ayah 6 (29:6)
وَمَن جَٰهَدَ فَإِنَّمَا يُجَٰهِدُ لِنَفۡسِهِۦٓۚ إِنَّ ٱللَّهَ لَغَنِيٌّ عَنِ ٱلۡعَٰلَمِينَ ٦
English translation (Saheeh International)
And whoever strives only strives for [the benefit of] himself. Indeed, Allāh is Free from need of the worlds.
Brief commentary
And whoever exerts himself by motivating it to guidance and staying far from disobedience, and whoever strives in the way of Allah, he is only doing so for his own benefit. Allah is Self-Sufficient and in no need of all the creation. Their obedience does not increase Him nor does their disobedience decrease Him.