Surah Al-Furqan, ayah 57

25:57

قُلۡ مَآ أَسۡـَٔلُكُمۡ عَلَيۡهِ مِنۡ أَجۡرٍ إِلَّا مَن شَآءَ أَن يَتَّخِذَ إِلَىٰ رَبِّهِۦ سَبِيلٗا ٥٧

Qul mā as'alukum 'alayhi min ajrin illā man shā'a an yattakhidha ilā rabbihī sabīlā

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