It is narrated from Abdullah bin Umar (may Allah be pleased with them) that the Messenger of Allah (peace be upon him) said: "Beware! Indeed, in the case of a person killed by mistake resembling intentional murder, which is done with a whip or a stick, the compensation is one hundred camels, of which forty are pregnant she-camels with offspring in their wombs."
Hadith Referenceمسند الإمام الشافعي / كتاب القتل والقصاص والديات والقسامة / 1640