(103) باب فِي لُزُومِ السَّاقَةِ
Narrated Jabir ibn Abdullah:
The Messenger of Allah (ﷺ) used to keep to the rear when travelling and urge on the weak. He would take someone up behind him and make supplication for them all.
Reference: Sunan Abi Dawud 2639
In-book reference: Book 15, Hadith 163
English translation: Book 14, Hadith 2633