سنن النسائي

It was narrated from 'Uqbah bin Aws, that: a man from among the Companions of the Prophet (ﷺ) delivered a speech on the Day of the Conquest of Makkah and said: 'Indeed the accidental killing, which seems international, with a whip, a stick, or a rock, (the Diyah) is one hundred camels, of which forty should be pregnant she-camels between the ages of six and nine years old, all in the middle of their pregnancies."