قُل ما سَأَلتُكُم مِن أَجرٍ فَهُوَ لَكُم ۖ إِن أَجرِيَ إِلّا عَلَى اللَّهِ ۖ وَهُوَ عَلىٰ كُلِّ شَيءٍ شَهيدٌ

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