(26) باب جَنِينِ الْمَرْأَةِ وَأَنَّ الْعَقْلَ عَلَى الْوَالِدِ وَعَصَبَةِ الْوَالِدِ لاَ عَلَى الْوَلَدِ
Narrated Abu Huraira:
Two women from Hudhail fought with each other and one of them hit the other with a stone that killed her and what was in her womb. The relatives of the killer and the relatives of the victim submitted their case to the Prophet (ﷺ) who judged that the Diya for the fetus was a male or female slave, and the Diya for the killed woman was to be paid by the 'Asaba (near relatives) of the killer.
Reference: Sahih al-Bukhari 6910
In-book reference: Book 87, Hadith 48
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 9, Book 83, Hadith 45