Sayyiduna Abdullah bin Amr (may Allah be pleased with them both) said: The Prophet (peace and blessings be upon him) delivered a sermon on the day of the Conquest of Makkah and then narrated a long hadith, in which there was also: "Beware! For accidental killing that resembles deliberate killing (shibh al-'amd), done with a whip or a stick, the diyah is 100 camels, 40 of which must be pregnant."
Similarly, there is also a marfu' narration from Amr bin Shu'ayb, from his father, from his grandfather, about deliberate killing, shibh al-'amd and accidental killing; it will come, in sha' Allah, in the Book of Diyat (Blood Money).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الجنايات / 16000