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.
كَانَ رَسُولُ اللَّهِ ﷺ يَتَخَلَّفُ فِي الْمَسِيرِ فَيُزْجِي الضَّعِيفَ وَيُرْدِفُ وَيَدْعُو لَهُمْ
[Machine] The Messenger of Allah ﷺ used to lag behind during a journey, urging the weak ones and helping them catch up. It has been narrated from Umar ibn Al-Khattab (may Allah be pleased with him) that he used to do that.
كَانَ رَسُولُ اللهِ ﷺ يَتَخَلَّفُ فِي الْمَسِيرِ فَيُزْجِي الضَّعِيفَ وَيُرْدِفُ وَيَدْعُو لَهُمْ وَرُوِّينَا عَنْ عُمَرَ بْنِ الْخَطَّابِ ؓ أَنَّهُ كَانَ يَفْعَلُ ذَلِكَ