Sayyiduna Ibn Abbas (may Allah be pleased with them both) says that there were two women married to the same man, and there was ill-feeling between them. They fought, and one of them struck the other with a stone, so she died; and the child in her womb, whose hair had already grown, also miscarried. So he (peace and blessings be upon him) ruled concerning it that "the blood money is upon the 'aqilah of the killer." The slain woman's paternal uncle said: "O Messenger of Allah, a child has also miscarried whose hair had already grown." The father of the killer said: "You are lying. How can there be blood money for one who neither cried out, nor screamed, nor ate, nor drank?" So he (peace and blessings be upon him) said: "This one speaks with the rhymed speech of the Jahiliyyah," and he (peace and blessings be upon him) ordered a slave for the child. Sayyiduna Ibn Abbas (may Allah be pleased with them both) says that the name of one of them was Mulaykah and the other was Umm Ghutayf.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الديات / 16415