Sunan an-Nasa'i 3099

Muhammad ibn Abd Allah ibn Bazi informed us; he said: Bishr narrated to us—meaning Ibn al-Mufaddal—and said: Abd al-Rahman ibn Ishaq reported to us, from al-Zuhri, from Sahl ibn Sad, who said: I saw Marwan ibn al-Hakam sitting, so I went over and sat with him. He told us that Zayd ibn Thabit had told him that the Messenger of Allah (peace and blessings of Allah be upon him) had received the revelation: Those of the believers who sit back are not equal to those who strive in the cause of Allah. Ibn Umm Maktum then came while it was being dictated to me and said: Messenger of Allah, if I were able to strive, I would surely strive. Then Allah, Mighty and Majestic, sent down revelation while his thigh was upon mine; it became so heavy upon me that I thought my thigh would be crushed. Then the revelation lifted from him: Except for those with disabilities. Abu Abd al-Rahman said: This Abd al-Rahman ibn Ishaq is acceptable. But Abd al-Rahman ibn Ishaq, from whom Ali ibn Mushir, Abu Muawiyah, and Abd al-Wahid ibn Ziyad narrate from al-Numan ibn Sad, is not trustworthy.