Muslim

If he says: I said it because I found the narrators of reports, both in the past and recently, one of them narrates from another the hadith, though he did not witness it, nor did he ever hear anything from him at all. So when I saw that they permitted the narration of hadith among themselves in this way, as mursal, without hearing, and the mursal among the narrations, according to the foundation of our statement and the statement of the people of knowledge regarding reports, is not a proof, I was compelled, due to the reason I have described, to investigate the hearing of every narrator of a report from his source. So if I come upon his having heard from him, even for the slightest thing that is established from him, then for me, all that he narrates from him after that is established. But if knowledge of that escapes me, I suspend the report, and it does not have the status of proof for me, due to the possibility of irsal in it.