Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
tabarani:75Aḥmad b. Muḥammad b. Ṣadaqah > Abū Ḥafṣ ʿAmr b. ʿAlī > Yuqāl Qutil ʿUmar / Ibn Thalāth Wasittīn Wa-al-Thhabt

[Machine] "He was fifty-eight years old."  

الطبراني:٧٥حَدَّثَنَا أَحْمَدُ بْنُ مُحَمَّدِ بْنِ صَدَقَةَ ثنا أَبُو حَفْصٍ عَمْرُو بْنُ عَلِيٍّ قَالَ يُقَالُ «§قُتِلَ عُمَرُ ؓ وَهُوَ ابْنُ ثَلَاثٍ وَسِتِّينَ» وَالثَّبْتُ

أَنَّهُ كَانَ ابْنَ ثَمَانٍ وَخَمْسِينَ