Sunan An-Nasa'i - سنن النسائي
13. The Book of Forgetfulness (In Prayer) - كتاب السهو
13) Chapter: Carrying small children and putting them down while praying
It was narrated from Abu Qatadah that:
The Messenger of Allah (ﷺ) used to pray carrying Umamah. When he prostrated he put her down and when he stood up he picked her up again.
13) باب حَمْلِ الصَّبَايَا فِي الصَّلاَةِ وَوَضْعِهِنَّ فِي الصَّلاَةِ
أَخْبَرَنَا قُتَيْبَةُ، قَالَ حَدَّثَنَا مَالِكٌ، عَنْ عَامِرِ بْنِ عَبْدِ اللَّهِ بْنِ الزُّبَيْرِ، عَنْ عَمْرِو بْنِ سُلَيْمٍ، عَنْ أَبِي قَتَادَةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم كَانَ يُصَلِّي وَهُوَ حَامِلٌ أُمَامَةَ فَإِذَا سَجَدَ وَضَعَهَا وَإِذَا قَامَ رَفَعَهَا .