Sunan an-Nasa'i 868
سنن النسائي#868Sahihأَخْبَرَنَا يَحْيَى بْنُ حَبِيبِ بْنِ عَرَبِيٍّ، قَالَ حَدَّثَنَا حَمَّادٌ، قَالَ حَدَّثَنَا عَاصِمٌ، عَنْ عَبْدِ اللَّهِ بْنِ سَرْجِسَ، قَالَ جَاءَ رَجُلٌ وَرَسُولُ اللَّهِ صلى الله عليه وسلم فِي صَلاَةِ الصُّبْحِ فَرَكَعَ الرَّكْعَتَيْنِ ثُمَّ دَخَلَ فَلَمَّا قَضَى رَسُولُ اللَّهِ صلى الله عليه وسلم صَلاَتَهُ قَالَ " يَا فُلاَنُ أَيُّهُمَا صَلاَتُكَ الَّتِي صَلَّيْتَ مَعَنَا أَوِ الَّتِي صَلَّيْتَ لِنَفْسِكَ " .
It was narrated that 'Abdullah bin Sarjis said:"A man came while the Messenger of Allah (ﷺ) was praying Subh, and he prayed two Rak'ahs then joined the prayer. When the Messenger of Allah (ﷺ) had finished praying he said: O so-and-so, which of them is your prayer - the one you prayed with us or the one you prayed on your own?
Scholarly Authentication
The label above is the grade most of these scholars gave, each scholar counted once — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. When they judged only its chain of narrators (“Isnaad”), the label says “Sound chain”. Each scholar's own wording:
Our source also lists this ruling under Abu Ghuddah, the editor of the printed edition it was taken from. It is al-Albani's ruling printed again, so it is counted once.
In-book reference: 10:92