وَمِنَ النّاسِ مَن يَشري نَفسَهُ ابتِغاءَ مَرضاتِ اللَّهِ ۗ وَاللَّهُ رَءوفٌ بِالعِبادِ

And there are those who sell themselves seeking approval of God; God is Kind to the servants.