مُسْنَدُ أَحْمَدَ
Musnad Ahmad 1962
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated that Ibn "Abbas said: Raisins would be soaked for the Messenger of Allah (ﷺ) and he would drink it for one day, then the next, then the next, until the evening of the third day. Then he would order that it be given to others to drink or be poured away.
Musnad Ahmad 1963Its Isnad is Sahih, Muslim (2004)]