The Messenger of Allah ﷺ liked the Muhajirun and the Ansar to stand directly behind him in prayer so they could learn from him.
حدثنا يزيد أنبأنا حميد
كان رسول الله ﷺ يحب أن يليه المهاجرون والأنصار في الصلاة ليأخذوا عنه
Its chain of transmission is sahih, it has already appeared at .