Narrated Safinah (RA) : The Prophet ﷺ said: The Caliphate of Prophecy will last thirty years; then Allah will give the Kingdom of His Kingdom to anyone He wills. Saeed told that Safinah said to him: Calculate Abu Bakrs caliphate as two years, Umars as ten, Uthmans as twelve and Ali so and so. Saeed said: I said to Safinah: They conceive that Ali was not a caliph. He replied: The buttocks of Marwan told a lie.