It is narrated from Abu Bakr bin Abi Shaybah that Sayyiduna Ali bin Abi Talib (may Allah be pleased with him) remained caliph for five years and was martyred in the fortieth year after the Hijrah of the Messenger of Allah (peace and blessings be upon him), when he was sixty-three years old. He was struck (and fatally wounded) on Friday, the 21st of the blessed month of Ramadan; he passed away on Sunday and was buried in Kufah.