وَمِنَ النّاسِ مَن يَشري نَفسَهُ ابتِغاءَ مَرضاتِ اللَّهِ ۗ وَاللَّهُ رَءوفٌ بِالعِبادِ

And of the people is he who sells himself, seeking means to the approval of Allah. And Allah is kind to [His] servants.