Saeed bin Musayyib said that not even the month of Dhu al-Hijjah had passed when Sayyiduna Umar, may Allah be pleased with him, was killed. (At the hands of Firoz the Magian; Allah, Glorified and Exalted is He, accepted the supplication of Sayyiduna Umar, may Allah be pleased with him, and granted him the rank of martyrdom.)