It is narrated from Sayyiduna Abu Qatadah Ansari (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Fasting three days in every month is equal to fasting for a lifetime." These are the words of the narration of Shubah. And in the narration of Hammad bin Zaid, it is stated: "Three fasts of every month and the fasts of Ramadan become equal to fasting for a lifetime until the next Ramadan." Imam Abu Bakr (may Allah have mercy on him) says that I have already mentioned in Kitab al-Kabir the ahadith of Sayyiduna Abu Hurairah and Abdullah bin Amr (may Allah be pleased with them both) with this meaning. The Imam says that in the narration of Sayyiduna Abu Salamah from Sayyiduna Abdullah bin Amr (may Allah be pleased with them), these words are found: "So every good deed is rewarded tenfold, thus it will be equal to fasting for a lifetime." Similarly, in the hadith of Sayyiduna Abu Dharr (may Allah be pleased with him) from Abu Uthman, it is mentioned, and the confirmation of this is also found in the Book of Allah, the Noble Qur'an «‏‏‏‏مَن جَاءَ بِالْحَسَنَةِ فَلَهُ عَشْرُ أَمْثَالِهَا» ‏‏‏‏ [ سورة الأنعام: 160 ] "Whoever brings a good deed will have ten times the like thereof as reward."