Jami` at-Tirmidhi 1410

Narrated Abu Hurairah:"The Messenger of Allah (ﷺ) judged that a Ghurrah male slave or female slave be given in the case of a fetus. The one of the judgement was made against said: 'Should we give something for one who did not drink, not eat, nor cry out to shed a tear, the likes of which is useless?' So the Prophet (ﷺ) said: 'This is the speech of a poet. Rather it requires a Ghurrah: a male slave or a female slave