Riyad as-Salihin 1753
'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 رَضِيَ اللهُ عنها، قالت: سَمِعْتُ رسولَ الله - صلى الله عليه وسلم - يقولُ: 
"لا صَلاَةَ بِحَضْرَةِ طَعَامٍ، وَلاَ وَهُوَ يُدَافِعُهُ الأَخْبَثَانِ". ((رواه مسلم‏)) ‏