“The Messenger of Allah ﷺ said: ‘If anyone of you is uncertain about his prayer, let him try to do what is correct then let him prostrate twice.’” Tanafisi said: "This is the basic rule, and no one is able to reject it."
رَسُولُ اللَّهِ ﷺ إِذَا شَكَّ أَحَدُكُمْ فِي الصَّلاَةِ فَلْيَتَحَرَّ الصَّوَابَ ثُمَّ يَسْجُدْ سَجْدَتَيْنِ قَالَ الطَّنَافِسِيُّ هَذَا الأَصْلُ وَلاَ يَقْدِرُ أَحَدٌ يَرُدُّهُ
[Machine] From the Messenger of Allah ﷺ , he said: "If any of you is doubtful about his prayer, let him correct it, then let him offer the salutation, and then let him prostrate twice."
عَنْ رَسُولِ اللَّهِ ﷺ قَالَ «إِذَا شَكَّ أَحَدُكُمْ فِي صَلَاتِهِ فَلْيَتَحَرَّ الصَّوَابَ ثُمَّ لْيُسَلِّمْ ثُمَّ لْيَسْجُدْ سَجْدَتَيْنِ»
[Machine] The Messenger of Allah ﷺ said, "If anyone of you is in doubt about what he has written, then he should consider carefully and then prostrate in the sajda of forgetfulness."
قَالَ رَسُولُ اللهِ ﷺ «إِذَا شَكَّ أَحَدُكُمْ فِي الْمَكْتُوبَةِ فَلْيَتَحَرَّ ثُمَّ يَسْجُدْ سَجْدَتَيِ السَّهْوِ»
[Machine] The Messenger of Allah ﷺ said, "If any one of you doubts his prayer, then he should strive to do what is right and perform two prostrations of forgetfulness while sitting."
قَالَ رَسُولُ اللهِ ﷺ «إِذَا شَكَّ أَحَدُكُمْ فِي صَلَاتِهِ فَلْيَتَحَرَّ الصَّوَابَ وَلْيَسْجُدْ سَجْدَتَيِ السَّهْوِ وَهُوَ جَالِسٌ»