Surah Ar-Rum 30:39
ﲜ ﲝ ﲞ ﲟ ﲠ ﲡ ﲢ ﲣ ﲤ ﲥ ﲦ ﲧ ﲨ ﲩ ﲪ ﲫ ﲬ ﲭ ﲮ ﲯ ﲰ ﲱ ﲲ
And whatever you give for interest to increase within the wealth of people will not increase with Allah. But what you give in zakah, desiring the countenance of Allah - those are the multipliers.