Quranic Ayat

Who is he that will loan to Allah a beautiful loan which Allah will double unto his credit
and multiply many times?
It is Allah that giveth (you) want or plenty and to Him shall be
your return.
(Al-Baqarah, 245)

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.
(Al-Hadid, 18)