Mukhtasar Bukhari

Sayyiduna Uqbah bin Amr Abu Mas’ud (may Allah be pleased with him) says that the Messenger of Allah (peace and blessings of Allah be upon him) pointed with his hand towards Yemen and then said: “(True) faith is in Yemen. Harshness and hard-heartedness (cruelty) are among those people who drive the camels by holding their tails.” (Then he pointed towards the east and said:) “From where the horns of Satan will emerge, that is, among the tribes of Rabi’ah and Mudar (there will be harshness and cruelty).”