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.
Hadith Referenceسنن ابي داود / كتاب الجهاد / 2639
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:صحيح, مشكوة المصابيح (3913), أخرجه الحاكم (2/115) أبو الزبير صرح بالسماع عنده