Abu Uthman says: This report reached me that Sayyiduna Abu Hurairah (may Allah be pleased with him) says: Indeed, Allah Almighty grants His believing servant one million good deeds in exchange for a single good deed. Then it happened that I got the opportunity to perform Hajj or Umrah, so I went and met Sayyiduna Abu Hurairah (may Allah be pleased with him) and said to him: A hadith has reached me from you that you say the Messenger of Allah (peace and blessings be upon him) said: Indeed, Allah Almighty grants His believing servant one million good deeds for a single good deed. He said: No, (I did not narrate this hadith), but I heard the Messenger of Allah (peace and blessings be upon him) saying: Indeed, Allah Almighty grants His servant twenty million good deeds. Then the Prophet (peace and blessings be upon him) recited this verse: Allah Almighty increases that good deed and grants a great reward from Himself. Now, who is there who can estimate the greatness of that reward?