[Machine] While we were with the Messenger of Allah ﷺ in the mosque, a man from the Ansar came after the Messenger of Allah ﷺ had finished praying and he prayed. Then he approached the Messenger of Allah ﷺ and greeted him. The Messenger of Allah ﷺ said, "Go back and pray, for you have not prayed." Then he mentioned the hadith of Ismail bin Ja'far.  

بَيْنَمَا نَحْنُ عِنْدَ رَسُولِ اللَّهِ ﷺ فِي الْمَسْجِدِ إِذْ أَقْبَلْ رَجُلٌ مِنَ الْأَنْصَارِ بَعْدَ أَنْ فَرَغَ رَسُولُ اللَّهِ ﷺ مِنَ الصَّلَاةِ فَصَلَّى ثُمَّ أَقْبَلَ حَتَّى قَامَ عَلَى رَسُولِ اللَّهِ ﷺ فَسَلَّمَ عَلَيْهِ فَقَالَ «وَعَلَيْكَ ارْجِعْ فَصَلِّ فَإِنَّكَ لَمْ تُصَلِّ» فَذَكَرَ الْحَدِيثَ «وَأَمَّا حَدِيثُ إِسْمَاعِيلَ بْنِ جَعْفَرٍ»