Musannaf Ibn Abi Shaybah 8154 — Holding back stool and urine during

Al-Qasim bin Muhammad said: One of the nephews of Sayyidah Aishah (may Allah be pleased with her) came to her. When he got up to go to the mosque, Sayyidah Aishah (may Allah be pleased with her) said to him: "Sit down, for I heard the Messenger of Allah (peace and blessings be upon him) say: 'None of you should pray in the presence of food, nor while he is holding back urine and stool.'"