Sunan an-Nasa'i 4798
سنن النسائي#4798SahihIt was narrated from Ya'qub bin Aws that:a man from among the Companions of the Prophet narrated to him that the Prophet entered Makkah during the Year of the Conquest, and said: 'Indeed, accidental killing on purpose, is killing with a whip or stick, for which forty (she-camels) with their young in their wombs
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih Lighairihi
Al-AlbaniSahih
Zubair Ali ZaiHasan
In-book reference: 45:93