(9) باب فِي الْخُلَفَاءِ
Makhul said:
The Romans will enter Syria and stay there for forty days, and no place will be saved from them but Damascus and 'Uman.
Reference: Sunan Abi Dawud 4638
In-book reference: Book 42, Hadith 43
English translation: Book 41, Hadith 4621