Musnad Ahmad Hadith 18148

It is narrated from Mughirah (may Allah be pleased with him) that two women had a fight, and one of them killed the other by striking her with a tent pole. The Prophet Muhammad (ﷺ) ruled that the blood money (diyah) should be paid by the male relatives ('asaba) of the killer, and for the loss of the unborn child in her womb, he ruled for a male or female slave as compensation. A Bedouin said, "You impose compensation on me for a life that neither ate nor drank, neither cried nor moved; such a life is usually overlooked." The Prophet Muhammad (ﷺ) said, "This is the kind of rhymed speech Bedouins use, but the ruling remains that for the loss of that child, the compensation is a male or female slave."