Two women from the tribe of Hudhail (fought with each other) and one of them threw (a stone at) the other, causing her to have a miscarriage and Messenger of Allah ﷺ gave his verdict that the killer (of the fetus) should give a male or female slave (as a Diya).  

أَنَّ امْرَأَتَيْنِ مِنْ هُذَيْلٍ رَمَتْ إِحْدَاهُمَا الأُخْرَى فَطَرَحَتْ جَنِينَهَا فَقَضَى رَسُولُ اللَّهِ ﷺ فِيهَا بِغُرَّةٍ عَبْدٍ أَوْ أَمَةٍ  

'Umar consulted the companions about the case of a woman's abortion (caused by somebody else). Al-Mughira said: The Prophet ﷺ gave the verdict that a male or female slave should be given (as a Diya). Then Muhammad bin Maslama testified that he had witnessed the Prophet ﷺ giving such a verdict.  

الْمُغِيرَةُ قَضَى النَّبِيُّ ﷺ بِالْغُرَّةِ عَبْدٍ أَوْ أَمَةٍ فَقَالَ ائْتِ مَنْ يَشْهَدُ مَعَكَ فَشَهِدَ مُحَمَّدُ بْنُ مَسْلَمَةَ أَنَّهُ شَهِدَ النَّبِيَّ ﷺ قَضَى بِهِ  

'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."  

سَمِعَ النَّبِيَّ ﷺ قَضَى فِي السِّقْطِ وَقَالَ الْمُغِيرَةُ أَنَا سَمِعْتُهُ قَضَى فِيهِ بِغُرَّةٍ عَبْدٍ أَوْ أَمَةٍ قَالَ ائْتِ مَنْ يَشْهَدُ مَعَكَ عَلَى هَذَا فَقَالَ مُحَمَّدُ بْنُ مَسْلَمَةَ أَنَا أَشْهَدُ عَلَى النَّبِيِّ ﷺ بِمِثْلِ هَذَا  

I heard Al-Maghira bin Shuʿba narrating that ʿUmar had consulted them about the case of abortion (similarly as narrated in No. 42).  

أَنَّهُ اسْتَشَارَهُمْ فِي إِمْلاَصِ الْمَرْأَةِ مِثْلَهُ