Prayer should not be offered when food is ready, nor when one is in dire need of answering the call of nature."" [Sahih/Authentic-Muslim]
"لا صلاة بِحَضرَة طَعَام، وَلا وهو يُدَافِعُه الأَخبَثَان». [صحيح.] - [رواه مسلم.]"