From Sahih Bukhari (Hadith 6907):
Narrated Hisham's father: 'Umar asked the people, "Who heard the Prophet (ﷺ) giving his verdict regarding abortions?" Al-Mughira said, "I heard him judging that a male or female slave should be given (as a Diya)." 'Umar said, "Present a witness to testify your statement." Muhammad bin Maslama said, "I testify that the Prophet (ﷺ) gave such a judgment
Reference: Bukhari 6907