'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]. (RU)
App reference (RU): Book 18, Hadith 243 (RU)
Arabic/English book reference (RU): Book 18, Hadith 1753 (RU)