The Prophet ﷺ appointed ʿAbdullah bin Jubair as the commander of the cavalry archers on the day of the battle of Uhud. Then they returned defeated, and that what is referred to by Allah's Statement:-- "And the Apostle (Muhammad) was in your rear calling you back." (3.153)
جَعَلَ النَّبِيُّ ﷺ عَلَى الرَّجَّالَةِ يَوْمَ أُحُدٍ عَبْدَ اللَّهِ بْنَ جُبَيْرٍ وَأَقْبَلُوا مُنْهَزِمِينَ فَذَاكَ إِذْ يَدْعُوهُمُ الرَّسُولُ فِي أُخْرَاهُمْ
The Prophet ﷺ appointed ʿAbdullah bin Jubair as the commander of the infantry during the battle of Uhud. They returned defeated, and that is what is meant by:-- "And the Apostle was calling them back in the rear. None remained with the Prophet ﷺ then, but twelve men."
جَعَلَ النَّبِيُّ ﷺ عَلَى الرَّجَّالَةِ يَوْمَ أُحُدٍ عَبْدَ اللَّهِ بْنَ جُبَيْرٍ وَأَقْبَلُوا مُنْهَزِمِينَ فَذَاكَ إِذْ يَدْعُوهُمُ الرَّسُولُ فِي أُخْرَاهُمْ وَلَمْ يَبْقَ مَعَ النَّبِيِّ ﷺ غَيْرُ اثْنَىْ عَشَرَ رَجُلاً