مُسْنَدُ أَحْمَدَ
Musnad Ahmad 2505
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated that Ibn Abbas said that The Prophet (ﷺ) broke his fast in ‘Arafah. Ummul-Fadl sent some milk to him and he drank it.
Musnad Ahmad 2517lts isnad is saheeh]