Bulugh al-Maram
Samurah bin Jundub (RAA) narrated, ‘I offered the funeral prayer behind the Prophet (ﷺ) for a woman who had died during child-birth and he (prayed) standing opposite the middle of her body.' Agreed upon.
وَعَنْ سَمُرَةَ بْنِ جُنْدُبٍ - رضى الله عنه - قَالَ: { صَلَّيْتُ وَرَاءَ اَلنَّبِيِّ - صلى الله عليه وسلم -عَلَى امْرَأَةٍ مَاتَتْ فِي نِفَاسِهَا, فَقَامَ وَسْطَهَا } مُتَّفَقٌ عَلَيْهِ 1 .
Reference