Sayyiduna Uqbah bin Amr Abu Mas'ud (may Allah be pleased with him) narrated that the Messenger of Allah (peace and blessings be upon him) pointed with his hand towards Yemen and said: "Indeed, faith is over there, in Yemen. Yes, and harshness and hard-heartedness are among those people who drive the camels by holding their tails, from where the horns of Satan will appear, that is, among the tribes of Rabi'ah and Mudar."