Surah Al-Hadid (The Iron), Verse 18

اِنَّ الْمُصَّدِّقِیْنَ وَالْمُصَّدِّقٰتِ وَاَقْرَضُوا اللّٰهَ قَرْضًا حَسَنًا یُّضٰعَفُ لَهُمْ وَلَهُمْ اَجْرٌ كَرِیْمٌ ۟

Innal mussaddiqeena wal mussaddiqaati wa aqradul laaha qardan hassanany yudaa'afu lahum wa lahum ajrun kareem

“For those who give in Charity, men and women, and loan to Allah a Beautiful Loan, it shall be increased manifold (to their credit), and they shall have (besides) a liberal reward.”

Quran 57:18 (Yusuf Ali Translation)