Musannaf Ibn Abi Shayba 18:31

Abu Bakr narrated to us, he said: Abu al-Ahwas narrated to us, from Abu Ishaq, from Alqama and al-Aswad, from Abdullah, who said: "Quasi-intentional (homicide) is in four quarters: twenty-five *hiqqah* (four-year-old camels), twenty-five *jadha'ah* (five-year-old camels), twenty-five *bint makhad* (one-year-old female camels), and twenty-five *bint labun* (two-year-old female camels)."