Al-Zuhri narrates: After the passing of the Prophet (peace and blessings be upon him), Sayyiduna Abu Bakr (may Allah be pleased with him) sent commanders to Syria, and he appointed Sayyiduna Khalid bin Sa'id (may Allah be pleased with him) as commander of an army.
Al-Tabarani recorded it, and its narrators are the narrators of the Sahih, except that al-Zuhri did not live in the time of Sayyiduna Abu Bakr (may Allah be pleased with him).