کتاب الفتن · نُعیم بن حماد

Allah Almighty gave Ishmael, peace be upon him, twelve leaders from his blood, the best and best of them being Abu Bakr al-Siddiq, Omar ibn al-Khattab, and Uthman Dhul-Nour, who is killed unjustly and is given his reward twice, and the king of the Levant and his son, and al-Saffah, and Mansour, and Sin and Salam, meaning goodness and well-being.