مُسْنَدُ أَحْمَدَ
Musnad Ahmad 1888
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
Al-Muttalib bin ‘Abdullah bin Hantab narrated that Ibn "Abbas used to do wudoo’ washing each part once and he attributed that to the Messenger of Allah (ﷺ).
Musnad Ahmad 1889Sahih, its isnad is da'eef]