Musnad Ahmad 1931

It was narrated from Sa’eed bin al-Huwairith, who heard Ibn "Abbas (say). We were with the Prophet (ﷺ) and he went to the outhouse, then he came out and called for food - on one occasion he said: food was brought - and it was said: O Messenger of Allah, aren"t you going to do wudoo? He said: "I am not going to pray such that I needed to do wudoo’."