Sahih Muslim Book 16, Hadith Number 4166.

Chapter : Blood-wit of the child in the womb; and the essentiality of blood-with in case of unintentional murder and in case of the quasi-intentional murder.

Abu Huraira reported that among two women of the tribe of Hudhail one flung a stone upon the other causing an abortion to her Allah’s Apostle (may peace he upon him) gave judgment that a male or a female slave of best quality be given as compensation.