Ash-Shu'ara 26:180

وَمَآ أَسْـَٔلُكُمْ عَلَيْهِ مِنْ أَجْرٍ ۖ إِنْ أَجْرِىَ إِلَّا عَلَىٰ رَبِّ ٱلْعَـٰلَمِينَ

Wamā asalukum ʿalayhi min ajrin in ajriya illā ʿalā rabbi l-ʿālamīna

And I do not ask you for it any payment. My payment is only from the Lord of the worlds.