مُسْنَدُ أَحْمَدَ
Musnad Ahmad 3087
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated from Ibn ‘Abbas (رضي الله عنه) that He did wudoo' and washed each part once, then he said that the Prophet (ﷺ) did that.
Musnad Ahmad 3113lts isnad is saheeh, al-Bukhari (157)]