What was narrated concerning: Once the Iqamah has been called, there should be no Prayer except the obligatory one
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا أَبُو مُعَاوِيَةَ، عَنْ عَاصِمٍ، عَنْ عَبْدِ اللَّهِ بْنِ سَرْجِسَ، أَنَّ رَسُولَ اللَّهِ ـ صلى الله عليه وسلم ـ رَأَى رَجُلاً يُصَلِّي الرَّكْعَتَيْنِ قَبْلَ صَلاَةِ الْغَدَاةِ وَهُوَ فِي الصَّلاَةِ فَلَمَّا صَلَّى قَالَ لَهُ: " بِأَىِّ صَلاَتَيْكَ اعْتَدَدْتَ؟ " .
It was narrated from ‘Abdullah bin Sarjis that the Messenger of Allah (ﷺ) saw a man performing the two Rak’ah before the morning prayer while he himself was performing prayer. When he had finished praying he said to him: “Which of your two prayers did you intend to be counted (i.e., accepted)?”