ENOfficial
It was narrated from Al-Qasim bin Rabi'ah, from 'Abdullah bin 'Amr, the Prophet (ﷺ) said: "The accidental killing, which seems intentional, with a whip or stick, (the Diyah) is one hundred camels, of which forty should be (she-camels) which their young in their wombs."
Source: sunnah.com
Other translations
Arabic
أَخْبَرَنَا مُحَمَّدُ بْنُ بَشَّارٍ، قَالَ حَدَّثَنَا عَبْدُ الرَّحْمَنِ، قَالَ حَدَّثَنَا شُعْبَةُ، عَنْ أَيُّوبَ السَّخْتِيَانِيِّ، عَنِ الْقَاسِمِ بْنِ رَبِيعَةَ، عَنْ عَبْدِ اللَّهِ بْنِ عَمْرٍو، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ " قَتِيلُ الْخَطَإِ شِبْهِ الْعَمْدِ بِالسَّوْطِ أَوِ الْعَصَا مِائَةٌ مِنَ الإِبِلِ أَرْبَعُونَ مِنْهَا فِي بُطُونِهَا أَوْلاَدُهَا " .
sunnah.com