Yahya bin Bukayr said: Talhah bin Ubaydullah (may Allah be pleased with him) was martyred on the day of the Battle of the Camel, in Jumada of the year 36 AH, and he was 52 or 54 years old. Al-Zubayr was older than him. His kunyah was Abu Muhammad.
Hadith Referenceالمعجم الكبير للطبراني / العشرة / 199