Surah Saba 34:47

قُلْ مَا سَأَلْتُكُم مِّنْ أَجْرٍ فَهُوَ لَكُمْ ۖ إِنْ أَجْرِىَ إِلَّا عَلَى ٱللَّهِ ۖ وَهُوَ عَلَىٰ كُلِّ شَىْءٍ شَهِيدٌ

Say, "Whatever payment I might have asked of you - it is yours. My payment is only from Allāh, and He is, over all things, Witness."

Translation: Saheeh International

Tafsir

Say to them ‘I have not asked you in return for my warning and delivering the Message to you any reward since it is for the benefit of you in other words I do not ask you for any reward in return for this. Indeed my reward lies only with God and He is Witness over all things’ observing them all knowing my truthfulness.

Excerpt from Tafsir al-Jalalayn, commentary on 34:47, via Quran.com. The reader has the full commentary and 9 more tafsirs.