Prohibition of Placing the hands on the sides during As-Salat (The Prayer)

'Aishah (May Allah be pleased with her) said:
I heard the Messenger of Allah ﷺ saying, "No Salat (prayer) should be performed when the food has been served, nor should it be performed when a person is in need of relieving himself."

[Muslim].

عن عائشة رضي الله عنها قالت: سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ " لاَ صَلاَةَ بِحَضْرَةِ الطَّعَامِ وَلاَ وَهُوَ يُدَافِعُهُ الأَخْبَثَانِ " ((رواه مسلم)).