مُسْنَدُ أَحْمَدَ
Musnad Ahmad 1666
Musnad of 'Abdur-Rahman bin 'Awf az-Zuhri
It was narrated that Ibn "Abbas said: I heard ‘Abdur Rahman bin ‘Awf say: I heard the Messenger of Allah (ﷺ) say: "If there is an epidemic in some land and you are not there, then do not enter it; if it is in a land where you are, do not leave it.”
Musnad Ahmad 1666Qawi (Darussalam), al- Bukhari (5729)and Muslim (2219)]]