Urwah (may Allah have mercy on him) states, among the names of those martyred on the day of the Bridge of al-Mada'in alongside Sayyiduna Sa'd bin Abi Waqqas (may Allah be pleased with him), of the Ansar, then of Banu Amr bin Mabdhul: Thabit bin Atik.
Hadith Referenceالمعجم الكبير للطبراني / باب الثاء / 1339