Ubayd bin Nudaylah al-Khuza'i (may Allah have mercy on him) narrates from Sayyiduna al-Mughirah bin Shu'bah (may Allah be pleased with him), who said: A co-wife struck her co-wife with a tent pole and killed her. Judgment was given that her blood money was due from the agnatic relatives ('asabah) of the killer, and for what was in her womb, a slave (ghurrah). At this a Bedouin said: "Do you make me pay compensation for one who neither ate nor drank, neither cried out nor wailed? Such a thing should simply go unrequited." The Prophet (peace and blessings be upon him) said: "Is this rhymed speech like the rhymed speech of the Bedouins?" Abu Hudhayfah added in his narration: "And for what was in her womb, judgment was given of a slave (ghurrah)."
Hadith Referenceالمعجم الكبير للطبراني / باب الميم / 18102