"Let it be noted of the first generation, as to how the Companions (رضي الله عنهم) hastened after the death of the Messenger of Allah ﷺ to appoint the Imam and contract the pledge of allegiance, and how they believed that it was a conclusive obligation (farḍ), a right and mandated (wājib) with immediacy and urgency, as well as how they left the preparation of the Messenger of Allah ﷺ (for burial) through being busy with it (appointing the Imam)."
The Caliphate 