(9) باب فِي الْخُلَفَاءِ
Safinah reported the Messenger of Allah (ﷺ) as saying:
The caliphate of Prophecy will last thirty years; then Allah will give the Kingdom to whom he wishes; or his kingdom to whom he wishes.
Reference: Sunan Abi Dawud 4647
In-book reference: Book 42, Hadith 52
English translation: Book 41, Hadith 4630