Full Sharh — Mishkat al-Masabih 3347
وَعَنْهُ قَالَ: اقْتَتَلَتِ امْرَأَتَانِ مِنْ هُذَيْلٍ فَرَمَتْ إِحْدَاهُمَا الْأُخْرَى بِحَجَرٍ فَقَتَلَتْهَا وَمَا فِي بَطْنِهَا فَقَضَى رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ أَنَّ دِيَةَ جَنِينِهَا غُرَّةٌ: عَبْدٌ أَوْ وَلِيدَةٌ وَقَضَى بِدِيَةِ الْمَرْأَةِ عَلَى عَاقِلَتِهَا وورَّثَها ولدَها وَمن مَعَهم
English Translation
He said that two women of Hudhail fought together and one of them threw a stone at the other killing both her and what was in her womb. Then God’s Messenger gave judgment that the blood wit for her unborn child should be a male or female slave of the best quality, he gave judgment that the woman responsible for blood wit should pay her blood wit, and he made her sons and those who were with them her heirs. (Bukhari and Muslim.)
Source
Mishkat al-Masabih(مشكاة المصابيح)
Retaliation
Hadith Number
3347