Surah Al-Furqan, Verse 57

قُلۡ مَآ أَسۡـَٔلُكُمۡ عَلَيۡهِ مِنۡ أَجۡرٍ إِلَّا مَن شَآءَ أَن يَتَّخِذَ إِلَىٰ رَبِّهِۦ سَبِيلٗا٥٧

qul mā asalukum ʿalayhi min ajrin illā man shāa an yattakhidha ilā rabbihi sabīlan

Say, "I do not ask of you for it any payment - only that whoever wills might take to his Lord a way."