Musnad Ahmad 30:3092

Muhammad ibn Ja'far narrated to us, Shu'bah narrated to us, from Sulayman, who said: I heard Dhakwan narrating from Abu Hurayrah, from the Prophet, may Allah bless him and grant him peace, that he said: "The people of Yemen have come; they are the most tender of hearts and the softest of souls. Understanding (fiqh) is Yemeni, faith is Yemeni, and wisdom is Yemeni. Arrogance and pride are found in the owners of camels, while tranquility and dignity are found in the owners of sheep."