It is narrated from Sayyiduna Sa'd (may Allah be pleased with him) that he said: "In the time of the Messenger of Allah (peace and blessings be upon him) there were two men who were brothers, and one of them was more excellent than the other. Then the more excellent of the two died, and the other lived on for forty more nights after him, and then he too died. When the superiority of the first man over the other was mentioned before the Messenger of Allah (peace and blessings be upon him), he (peace and blessings be upon him) asked: 'Did he (the other) not pray?' The people said: 'Of course (he used to pray).' The Messenger of Allah (peace and blessings be upon him) said: 'And he was a decent (that is, righteous) man as well?' The people said: 'Yes.' He (peace and blessings be upon him) said: 'And what do you know of where (to what high rank) his prayer brought him?' Then, on that occasion, the Messenger of Allah (peace and blessings be upon him) said: 'The likeness of the prayers is only that of a deep, sweet-water river at a man's door, into which he plunges five times every day. So what do you think: would that leave any of his dirt? Indeed, you do not know to what station his prayer has brought him.'"
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Amir bin Sa'd (may Allah have mercy on him), from his father (Sayyiduna Sa'd (may Allah be pleased with him)), except Bukayr bin Abdullah bin al-Ashajj (may Allah have mercy on him), and no one narrated it from Bukayr (may Allah have mercy on him) except Makhramah (may Allah have mercy on him); Ibn Wahb (may Allah have mercy on him) is alone in it.
It was also narrated by the nephew of al-Zuhri (may Allah have mercy on him), from al-Zuhri (may Allah have mercy on him), from Salih bin Abdullah bin Abi Farwah (may Allah have mercy on him), from Amir bin Sa'd (may Allah have mercy on him), from Aban bin Uthman (may Allah have mercy on him), from his father, Sayyiduna Uthman (may Allah be pleased with him)."
Hadith Referenceالمعجم الأوسط / باب الميم / 6476
Hadith Gradingمحدثین:تفرد به ابن وهب
Hadith Takhrij«قال ابن عبد البر: تفرد به ابن وهب «التمهيد لما في الموطأ من المعاني والأسانيد، ج 24، ص 221»» «أخرجه ابن خزيمة فى «صحيحه» برقم: 310، والضياء المقدسي فى «الأحاديث المختارة» برقم: 988، 989، 990، والحاكم فى «المستدرك» برقم: 715، وأحمد فى «مسنده» برقم: 1553»