From Sahih Muslim (Hadith 189):
Abu Huraira said:I heard the Prophet (may peace and blessings be upon him) saying: There came the people of Yemen, they are tender of feelings and meek of hearts. The belief is that of the Yemenites, the sagacity is that of the Yemenites, the tranquillity is among the owners of goats and sheep, and pride and conceitedness is among the uncivil owners of the camels, the people of the tents in the direction of sunrise
Reference: Muslim 189