Qur'an 2:207

وَمِنَ ٱلنَّاسِ مَن يَشْرِى نَفْسَهُ ٱبْتِغَآءَ مَرْضَاتِ ٱللَّهِ ۗ وَٱللَّهُ رَءُوفٌۢ بِٱلْعِبَادِ

“And of the people is he who sells himself, seeking means to the approval of Allāh. And Allāh is Kind to [His] servants.”

Al-Baqara 2:207 · Saheeh International