Muhammad bin Abdullah bin Numayr said: Sayyiduna Sa'd bin Ubadah (may Allah be pleased with him) passed away two and a half years into the caliphate of Sayyiduna Umar (may Allah be pleased with him), in Hawran in the land of Syria; his kunyah was Abu Thabit.
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 5339