Dalil

Quran Al-Hadid 57:11

مَّن ذَا ٱلَّذِي يُقۡرِضُ ٱللَّهَ قَرۡضًا حَسَنٗا فَيُضَٰعِفَهُۥ لَهُۥ وَلَهُۥٓ أَجۡرٞ كَرِيمٞ

Translation

Who is it that would loan Allāh a goodly loan so He will multiply it for him and he will have a noble reward?