مُسْنَدُ أَحْمَدَ
Musnad Ahmad 3236
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
Sa'eed bin al-Huwairith narrated that he heard Ibn ‘Abbas (رضي الله عنه) say: The Messenger of Allah (ﷺ) went out and relieved himself, then food was brought to him and he ate and did not touch water.
Musnad Ahmad 3260Its isnad is saheeh, Muslim (374)]