It is narrated from Abu Bakr bin Khalid bin Urfutah (may Allah have mercy on him) that he came to Sayyiduna Sa'd bin Malik (may Allah be pleased with him) and said: "It has reached me that in Kufah you people are pressed to revile Sayyiduna Ali (may Allah be pleased with him); have you reviled him?" He said: "Allah forbid!" And he said: "By the One in whose Hand is the soul of Sa'd! I heard the Messenger of Allah (peace and blessings be upon him) say something about Sayyiduna Ali (may Allah be pleased with him) (after which), even if a saw were placed on the parting of my hair to make me revile him, I would never revile him."
Hadith Referenceمسند أبي يعلى الموصلي / مسند سعد بن أبي وقاص / 777
Hadith Takhrij«قال سعيد بن محمد السناري: ضعيف» «أخرجه النسائي في "الكبرى" [رقم 8477]، وفى "خصائص على" [رقم 92]، والبخارى في "الكنى" [رقم 17] وابن عساكر في "تاريخه [42/ 412]، والدورقى في "مسند سعد" [112]، وابن أبى شيبة في "المصنف"، وفى "مسنده" كما في "المطالب" [17/ 132/ طبعة العاصمة]، و، مسند ابویعلیٰ ترقیم الاثری: 772»