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:41al-Ḥusayn b. Isḥāq al-Tustarī > Hishām b. ʿAmmār > al-Haytham b. ʿImrān from my father > Tuwuffī

[Machine] I heard my grandfather say, "Abu Bakr passed away while he had an infection in his eye and he was the caliph for two and a half years."  

الطبراني:٤١حَدَّثَنَا الْحُسَيْنُ بْنُ إِسْحَاقَ التُّسْتَرِيُّ ثنا هِشَامُ بْنُ عَمَّارٍ ثنا الْهَيْثَمُ بْنُ عِمْرَانَ قَالَ

سَمِعْتُ جَدِّي يَقُولُ «تُوُفِّيَ أَبُو بَكْرٍ ؓ وَبِهِ طَرَفٌ مِنَ السُّلِ وَوَلِيَ سَنَتَيْنِ وَنِصْفًا»