The Mountain - 52:40
Or do you ask from them a wage, and this burdens them with a heavy debt?
Related:
The Arabic Letter Sad/38:86
"Say, "I do not ask you for a wage in return for this; I am not an impostor."
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.