(58) باب فَضْلِ الْعَمَلِ
It was narrated from Abu Hurairah that the Messenger :
of Allah (saas) said: "Every deed of the son of Adam will be multiplied for him, between ten and seven hundred times for each merit. Allah said: 'Except for fasting, for it is for Me and I shall reward for it.'" (sahih)
Reference: Sunan Ibn Majah 3823
In-book reference: Book 33, Hadith 168
English translation: Vol. 5, Book 33, Hadith 3823