مُسْنَدُ أَحْمَدَ
Musnad Ahmad 2545
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated that Ibn 'Abbas (رضي الله عنه) said: The Prophet (ﷺ) went to the outhouse and relieved himself, then some food was brought to him. They said: Should we bring you water for wudoo? He said: “Why should I do wudoo? When I want to pray, I will do wudoo’.”
Musnad Ahmad 2558Its isnad is saheeh, Muslim (374)]