Musnad Ahmad 28:76

Muhammad ibn Ja'far narrated to us, Shu'bah narrated to us, from Ayyub, who said: I heard al-Qasim ibn Rabi'ah narrating from Abdullah ibn Amr, that the Messenger of Allah (ﷺ) said: "The victim of quasi-intentional manslaughter—the victim of a whip or a stick—the compensation for him is one hundred [camels], forty of which are pregnant."