(243) باب مَنْ أَدْرَكَ مِنَ الْجُمُعَةِ رَكْعَةً
Abu Hurairah reported the Messenger of Allah (ﷺ) as saying:
If anyone obtains a rak'ah in the prayer (along with the imam), he has obtained the whole prayer.
Reference: Sunan Abi Dawud 1121
In-book reference: Book 2, Hadith 732
English translation: Book 2, Hadith 1116