Hadith 1683
Musnad of 'Abdur-Rahman bin 'Awf az-Zuhri
It was narrated from "Abdullah bin ‘Abbas that
"Umar bin al-Khattab set out for Syria, then when he was in Sargh, he was met by the commanders of the troops, Abu ‘Ubaidah bin al-Jarrah and his companions, and they told him that an epidemic had broken out in Syria.... and he narrated the same Hadeeth. He said: ‘Abdur-Rahman bin "Awf came, who had been away on an errand, and said: I know something about this. I heard the Messenger of Allah (ﷺ) say: "If it [the epidemic] is in a land and you are there, do not leave it, fleeing from it; and if you hear of it in some land, do not go there.
Hadith gradings, numbering and translations can differ between editions. For legal rulings or detailed interpretation, consult qualified scholarship and the referenced edition.