Sunan an-Nasa'i 557
سنن النسائي#557Sahihأَخْبَرَنِي مُوسَى بْنُ سُلَيْمَانَ بْنِ إِسْمَاعِيلَ بْنِ الْقَاسِمِ، قَالَ حَدَّثَنَا بَقِيَّةُ، عَنْ يُونُسَ، قَالَ حَدَّثَنِي الزُّهْرِيُّ، عَنْ سَالِمٍ، عَنْ أَبِيهِ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ " مَنْ أَدْرَكَ رَكْعَةً مِنَ الْجُمُعَةِ أَوْ غَيْرِهَا فَقَدْ تَمَّتْ صَلاَتُهُ " .
It was narrated from Salim, from his father, that the Prophet (ﷺ) said:"Whoever catches up with with a Rak'ah of Jumu'ah or any other (prayer), his prayer is complete
Scholarly Authentication
The label above is the grade most of these scholars gave — 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. Each scholar's own wording:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiHasan
In-book reference: 6:64