Abu Dawud Book 27, Hadith Number 4132.

Narated By Abdullah ibn Umar : Sa’id ibn Amr al-Qurashi quoting his father said: Ibn Umar (once) saw some fellow travellers of the Yemen. They had their saddles (on camels) of leather. He said: If anyone likes to see the fellow travellers most resembling to the Companions of the Apostle of Allah (PBUH), he should see them.