The Prophet ﷺ said: Kill the two black things during prayer, the snake and scorpion. (Using translation from Abū Dāʾūd 921)   

«أَمْرَ رَسُولُ اللهِ ﷺ بِقَتْلِ الْأَسْوَدَيْنِ فِي الصَّلَاةِ الْحَيَّةِ وَالْعَقْرَبِ»  

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. (Using translation from Nasāʾī 1204)  

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

[Machine] The Messenger of Allah ﷺ went out to pray while carrying on his shoulder Ummama bint Abi Al-'Asi ibn Ar-Rabi' and her mother Zainab bint Rasulullah ﷺ . Whenever he prostrated, he would place her down from his shoulder, and when he finished his prostration, he would carry her on his shoulder again. He continued to do so until he finished his prayer.  

أَنَّ رَسُولَ اللهِ ﷺ «خَرَجَ إِلَى الصَّلَاةِ وَهُوَ حَامِلٌ عَلَى عَاتِقِهِ أُمَامَةَ بِنْتِ أَبِي الْعَاصِي بْنِ الرَّبِيعِ وَأُمُّهَا زَيْنَبٌ بِنْتُ رَسُولِ اللهِ ﷺ فَكَانَ إِذَا رَكَعَ وَضَعَهَا عَنْ عَاتِقِهِ وَإِذَا فَرَغَ مِنْ سُجُودِهِ حَمَلَهَا عَلَى عَاتِقِهِ فَلَمْ يَزَلْ كَذَلِكَ حَتَّى فَرَغَ مِنْ صَلَاتِهِ»