6th Ayah from Surah Al Muddaththir
And do not confer favor to acquire more
do not be overwhelmed and weaken;
And give not a thing in order to have more (or consider not your deeds of Allah's obedience as a favour to Allah).
and do not do a favour (to anyone merely) to seek more (in return).
And show not favour, seeking wordly gain!
Nor expect, in giving, any increase (for thyself)!