أَخْبَرَنَا مُحَمَّدُ بْنُ الْمُثَنَّى، قَالَ حَدَّثَنَا سَهْلُ بْنُ يُوسُفَ، قَالَ حَدَّثَنَا حُمَيْدٌ، عَنِ الْقَاسِمِ بْنِ رَبِيعَةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ ‏"‏ الْخَطَأُ شِبْهُ الْعَمْدِ - يَعْنِي بِالْعَصَا وَالسَّوْطِ - مِائَةٌ مِنَ الإِبِلِ مِنْهَا أَرْبَعُونَ فِي بُطُونِهَا أَوْلاَدُهَا ‏"‏ ‏.‏

It was narrated from Al- Qasim bin Rabi'ah that the Messenger jof Allah said: "The accident that resembles on purpose, meaning (killing) with a stick or a whip, (for which the Diyah is) one hundred camels, of which forty should be (pregnant she-camels), with their young in their wombs." Translation Not Available

Book Ref: Sunan An Nisai Book 45 Hadith 4800
Web Ref:  Sunan An Nisai Vol 5 Book 45 Hadith 4804