Shu'bah reported from Habib: While we were in Madinah we heard of plague having broken out in Kufa. 'Ata bin Yasir and others said to me that Allah's Messenger (ﷺ) had said. If you are in a land where it (this scourge) has broken out, don't get out of it, and if you were to know that it had broken (in another land, then don't enter it. I said to him: From whom (did you hear it)? They said: 'Amir bin Sa'd has narrated it. So I came to him. They said that he was not present there. So I met his brother Ibrahim bin Sa'd and asked him. He said: I bear testimony to the fact that Usama narrated it to Sa'd saying: I heard Allah's Messenger (ﷺ) as saying that it is a God-sent punishment from the calamity or from the remnant of the calamity with which people were afflicted before you. So when it is in a land and you are there, don't get out of it, and if (this news reaches you) that it has broken out in a land, then don't enter therein. Habib said: I said to Ibrahim: Did you hear Usama narrating it to Sa'd and he was not denying it. He said: Yes.

This hadith has been transmitted on the authority of Sa'd bin Malik, Khuzaima bin Thabit and Usama bin Zaid.

Ibrahim bin Sa'd bin Abu Waqqas reported: Usama bin Zaid and Sa'd had been sitting and they had been conversing and they said this:

This hadith has been transmitted by Ibrahim bin Sa'd bin Malik on the authority of his father.

Sa'd reported Allah's Apostle (ﷺ) as saying to 'Ali (RA) : Aren't you satisfied with being unto me what Aaron was unto Moses (ؑ)?