Musnad Ahmad 28:57

Muhammad ibn Ja’far narrated to us, Shu’bah narrated to us, from Ayyub, I heard al-Qasim ibn Rabi’ah narrating from ‘Abdullah ibn ‘Amr, that the Messenger of Allah (peace and blessings of Allah be upon him) said: "The victim of quasi-intentional manslaughter—the victim of a whip or a stick—the blood money for him is one hundred [camels], forty of which are pregnant with their young in their bellies."