مُسْنَدُ أَحْمَدَ
Musnad Ahmad 3375
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated that Ibn 'Abbas (رضي الله عنه) said: The Messenger of Allah (ﷺ) broke his fast in ‘Arafah; Ummul-Fadl sent some milk to him and he drank it.
Musnad Ahmad 3398Its isnad is saheeh]