It is narrated from Sayyiduna Abu Umamah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "A man entered Paradise and saw written on its door: Charity is equal to ten times its like, and the reward of a loan is even greater than that, ten (times)."
Hadith Referenceالمعجم الكبير للطبراني / باب الصاد / 7945