AL AN'AAM — Ayat 90

أُوْلَـئِكَ الَّذِينَ هَدَى اللّهُ فَبِهُدَاهُمُ اقْتَدِهْ قُل لاَّ أَسْأَلُكُمْ عَلَيْهِ أَجْرًا إِنْ هُوَ إِلاَّ ذِكْرَى لِلْعَالَمِينَ

Those are the ones whom Allah has guided, so from their guidance take an example. Say, "I ask of you for this message no payment. It is not but a reminder for the worlds."