Sunan Abi Dawud 4299
سنن أبي داود#4299SahihAbu Dawud said:Ibn ‘Umar reported the Messenger of Allah (May peace be upon him)As saying: The Muslims will soon be besieged up to Madina so that their most distant frontier outpost will be Salah
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Muhyi Al-Din Abdul HamidSahih
Shuaib Al ArnautSahih
In-book reference: 39:9