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.  

أَنَّ رَسُولَ اللَّهِ ﷺ كَانَ يُصَلِّي وَهُوَ حَامِلٌ أُمَامَةَ فَإِذَا سَجَدَ وَضَعَهَا وَإِذَا قَامَ رَفَعَهَا  

"I saw the Messenger of Allah ﷺ leading the people in prayer, carrying Umamah bint Abi Al-'As on his shoulder. When he bowed he put her down and when he finished prostrating he picked her up again."  

رَأَيْتُ النَّبِيَّ ﷺ يَؤُمُّ النَّاسَ وَهُوَ حَامِلٌ أُمَامَةَ بِنْتَ أَبِي الْعَاصِ عَلَى عَاتِقِهِ فَإِذَا رَكَعَ وَضَعَهَا فَإِذَا فَرَغَ مِنْ سُجُودِهِ أَعَادَهَا