Yaseen - 36:21
Follow those who do not charge you anything. They are on the right path.
What is the intention?
The Arabic Letter Sad/38:86
"Say, "I do not ask you for a wage in return for this; I am not an impostor."
قُلْ مَٓا اَسْـَٔلُـكُمْ عَلَيْهِ مِنْ اَجْرٍ وَمَٓا اَنَا۬ مِنَ الْمُتَكَلِّف۪ينَ
The Pen/68:46
Or do you ask them for a wage and they are burdened with a heavy debt?
اَمْ تَسْـَٔلُهُمْ اَجْراً فَهُمْ مِنْ مَغْرَمٍ مُثْقَلُونَۚ
The Repentance/9:34
O you who believe, most of the scribes and religious leaders eat the people´s money without right and lead them astray from the way of Allah. Give glad tidings of a painful torment to those who hoard gold and silver and spend it not in the way of Allah.
يَٓا اَيُّهَا الَّذ۪ينَ اٰمَنُٓوا اِنَّ كَث۪يراً مِنَ الْاَحْبَارِ وَالرُّهْبَانِ لَيَأْكُلُونَ اَمْوَالَ النَّاسِ بِالْبَاطِلِ وَيَصُدُّونَ عَنْ سَب۪يلِ اللّٰهِۜ وَالَّذ۪ينَ يَكْنِزُونَ الذَّهَبَ وَالْفِضَّةَ وَلَا يُنْفِقُونَهَا ف۪ي سَب۪يلِ اللّٰهِۙ فَبَشِّرْهُمْ بِعَذَابٍ اَل۪يمٍۙ