Musnad Ahmad 27:1584

Sulayman narrated to us, Ibrahim ibn Sa'd narrated to us, from al-Zuhri, and Ya'qub said: My father narrated to us, from Ibn Shihab, from Salim ibn 'Abd Allah, that 'Abd Allah ibn 'Umar said: I heard the Messenger of Allah, peace and blessings of Allah be upon him, saying: "People are only like a hundred camels; you will scarcely find among them a riding beast." And Ya'qub said: "Like a hundred camels, there is no riding beast among them."