Ibn Shihab, among those from the Ansar who took part in the Pledge of al-Aqabah, mentioned Sayyiduna Bishr bin al-Bara' bin Ma'rur (may Allah be pleased with him) from Banu Salimah, a branch of the Ansar. He is the one who, at Khaybar, ate with the Prophet (peace and blessings be upon him) from the meat of the goat in which poison had been mixed.
Al-Tabarani recorded it as mursal (with a missing Companion link), and its chain is hasan (good). (Allamah al-Haythami says:) I say: This report has various routes, which I have mentioned in their relevant places.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب المناقب / 15749
Hadith Gradingمحدثین:إسنادہ حسن
Hadith Takhrij«اخرجه الطبراني فى المعجم الكبير (1200)»