Hadith 5:144
Ghundar narrated to us, from Shu'bah, who said: I asked al-Hakam and Hammad, I said: "If there are fifty cows?" Al-Hakam said: "In them is a *musinnah* (a cow in its third year)." And Hammad said: "According to the calculation of that."
حدثنا غندر عن شعبة قال سألت الحكم وحمادا قلت إن كانت خمسين بقرة فقال الحكم فيها مسنة وقال حماد بحساب ذلك