Riyad as-Salihin, Book 8, Hadith 971 (In-Book) ⓘ
Jabir (May Allah be pleased with him) reported: The Messenger of Allah used to lag behind while travelling and urge the weak to walk quickly. He used to take up someone behind him and make supplication for him.[Abu Dawud].
وعنه قال: كان رسول الله صلى الله عليه وسلم يتخلف في المسير، فيزجي الضعيف ويردف ويدعو له، ((رواه أبو داود بإسناد حسن)).