2:207
وَمِنَ ٱلنَّاسِ مَن يَشْرِى نَفْسَهُ ٱبْتِغَآءَ مَرْضَاتِ ٱللَّهِ ۗ وَٱللَّهُ رَءُوفٌۢ بِٱلْعِبَادِ
Wa minan naasi mai yashree nafsahub tighaaa'a mardaatil laah; wallaahu ra'oofum bil'ibaad
And among men is he who sells himself to seek the pleasure of Allah; and Allah is Affectionate to the servants.
