(8) باب فِي الْخَلِيفَةِ يَسْتَخْلِفُ
Narrated Ibn 'Umar:
'Umar said: I shall not appoint a successor, for the Messenger of Allah (ﷺ) did not appoint a successor. If I appoint a successor (I can do so), for Abu Bakr had appointed a successor. He Ibn 'Umar) said: I swear by Allah, he did not mention (anyone) but the Messenger of Allah (ﷺ) and Abu Bakr. So I learnt he would not equate anyone with the Messenger of Allah (ﷺ), for he did not appoint any successor.
Reference: Sunan Abi Dawud 2939
In-book reference: Book 20, Hadith 12
English translation: Book 19, Hadith 2933