Musnad Ahmad 30:2104

'Attab narrated to us, he said: 'Abdullah narrated to us, he said: Dawud ibn Qays informed us, he said: Abu Thifal al-Murri narrated to me, from Abu Hurayrah, that the Prophet, peace and blessings of Allah be upon him, said: "A *jadha'* (a lamb in its first year) of sheep is better than a *sayyid* (a large, mature animal) of goats." Dawud said: "The *sayyid* is the large one."