It is narrated from Sayyiduna Safinah that the Messenger of Allah, peace and blessings be upon him, said: The Caliphate will last for thirty years, after which kingship will come. Safinah said, count it: two years was the Caliphate of Sayyiduna Abu Bakr, may Allah be pleased with him, ten years was the Caliphate of Sayyiduna Umar, may Allah be pleased with him, twelve years was the Caliphate of Sayyiduna Uthman, may Allah be pleased with him, and six years was the Caliphate of Sayyiduna Ali, may Allah be pleased with him.