339 - باب كراهة الصلاة بحضرة الطعام ونفسه تتوق إليه أو مع مدافعة الأخبثين وهما البول والغائط
Abomination of Joining As-Salat (The Prayer) when the Food is ready or when one is in desperate need to answer the call of Nature
1753 - عن عائشة رضي الله عنها قالت سمعت رسول الله صلى الله عليه و سلم يقول : [ لا صلاة بحضرة طعام ولا هو يدافعه الأخبثان ] رواه مسلم
1753. `Aishah (May Allah be pleased with her) said: I heard the Messenger of Allah (PBUH) 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.''
Commentary: We learn from this Hadith that one should not offer Salat when he is hungry and the food has been served or has to answer the call of nature. The reason behind is that if one offers Salat in that condition, he will not be able to do it with full concentration. Similarly, if one has to answer the call of nature, he should first do so and then offer Salat.
340 - باب النهي عن رفع البصر إلى السماء في الصلاة
Prohibition of raising one's Eyes towards the sky during As-Salat (The Prayer)