(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. (ID)
Reference (ID): Sunan Abi Dawud 4647 (ID)
In-book reference (ID): Book 42, Hadith 52 (ID)
English translation (ID): Book 41, Hadith 4630 (ID)