Mughira bin Shuba reported,

Two co-wives quarreled, and one of them struck the other with a tent pole and killed her. The Messenger of Allah ﷺ ruled that the blood-money was due from the killer's paternal male relatives, and he ruled that for the child in her womb a slave, male or female, must be given.The Arabi protested, "Am I to pay compensation for one who neither ate, nor drank, nor cried out, nor even drew breath? Surely such a claim should be dismissed."The Messenger of Allah ﷺ replied, "This is rhymed speech like the rhymed speech of the days of ignorance," and he upheld his ruling that a slave be given for the child in her womb.

Nasai 4827

Sahih

أخبرنا محمد بن بشار قال حدثنا عبد الرحمن قال حدثنا سفيان عن منصور عن إبراهيم عن عبيد بن نضيلة

عن المغيرة بن شعبة

أن ضرتين ضربت إحداهما الأخرى بعمود فسطاط فقتلتها فقضى رسول الله ﷺ بالدية على عصبة القاتلة وقضى لما في بطنها بغرة فقال الأعرابي تغرمني من لا أكل ولا شرب ولا صاح فاستهل فمثل ذلك يطل فقال سجع كسجع الجاهلية وقضى لما في بطنها بغرة

النسائي 4827صحيح
Contents
Reference
Commentary
Ayat
Collection
Sunan Nasai Sughra
Book
Sworn testimony
Chapter
Description of quasi-intentional killing, and what is narrated from Ali regarding blood money for fetuses and quasi-intentional killing, and mention of the differences in wording among narrators of the report of Ibrahim from Ubayd bin Nudayla from Mughira
Numbering
Darussalam 4827
Nasai 4827