The Prophet ﷺ offered the funeral prayer for the dead body of a woman who died during delivery (i.e. childbirth) and he stood by the middle of her body.  

أَنَّ امْرَأَةً مَاتَتْ فِي بَطْنٍ فَصَلَّى عَلَيْهَا النَّبِيُّ ﷺ فَقَامَ وَسَطَهَا  

"The Prophet prayed over a woman, so he stood at her middle."  

أَنَّ النَّبِيَّ ﷺ صَلَّى عَلَى امْرَأَةٍ فَقَامَ وَسَطَهَا  

It was narrated from Samurah bin Jundab Al-Fazari that the Messenger of Allah ﷺ offered the funeral prayer for a woman who had died in nifas* and he stood level with her middle (i.e. her waist).” *The postnatal bleeding period.  

أَنَّ رَسُولَ اللَّهِ ﷺ صَلَّى عَلَى امْرَأَةٍ مَاتَتْ فِي نِفَاسِهَا فَقَامَ وَسَطَهَا  

I prayed behing the Prophet ﷺ over a woman who died in childbirth, and he stood opposite her waist. (Using translation from Abū Dāʾūd 3195)   

صَلَّى النَّبِيُّ ﷺ عَلَى امْرَأَةٍ مَاتَتْ فِي نِفَاسِهَا فَقَامَ وَسَطَهَا  

That the Messenger of Allah offered the funeral prayer for a mother who had died in childbirth, and he stood in line with her middle. (Using translation from Nasāʾī 1979)   

أَنَّ النَّبِيَّ ﷺ صَلَّى عَلَى أُمِّ فُلَانٍ مَاتَتْ فِي نِفَاسِهَا فَقَامَ وَسَطَهَا  

[Machine] That the Prophet ﷺ "prayed on a mat"  

أَنَّ النَّبِيَّ ﷺ «صَلَّى عَلَى بِسَاطٍ»