“The Messenger of Allah ﷺ lagged behind (on a journey) and we reached the people when ‘Abdur Rahman bin ‘Awf had already led them in one Rak’ah of the prayer. When he realized that the Prophet ﷺ was there, he wanted to step back, but the Prophet ﷺ gestured to him that he should complete the prayer. He said: ‘You have done well, do the same in the future.’”  

تَخَلَّفَ رَسُولُ اللَّهِ ﷺ فَانْتَهَيْنَا إِلَى الْقَوْمِ وَقَدْ صَلَّى بِهِمْ عَبْدُ الرَّحْمَنِ بْنُ عَوْفٍ رَكْعَةً فَلَمَّا أَحَسَّ بِالنَّبِيِّ ﷺ ذَهَبَ يَتَأَخَّرُ فَأَوْمَأَ إِلَيْهِ النَّبِيُّ ﷺ أَنْ يُتِمَّ الصَّلاَةَ قَالَ وَقَدْ أَحْسَنْتَ كَذَلِكَ فَافْعَلْ