Sunan an-Nasa'i 557
سنن النسائي#557SahihIt 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
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiHasan
In-book reference: 6:64