Sunan an-Nasa'i, Book 14, Hadith 1436 (In-Book) ⓘ
It was narrated from Abu Hurairah that: The Prophet said: "Whoever catches up with a rak'ah of jumu'ah prayer has caught up with it."
أَخْبَرَنَا قُتَيْبَةُ، وَمُحَمَّدُ بْنُ مَنْصُورٍ، - وَاللَّفْظُ لَهُ - عَنْ سُفْيَانَ، عَنْ أَبِي سَلَمَةَ، عَنْ أَبِي هُرَيْرَةَ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ " مَنْ أَدْرَكَ مِنْ صَلاَةِ الْجُمُعَةِ رَكْعَةً فَقَدْ أَدْرَكَ " .
also referenced under: Volume 2, Book 14, Hadith 1426 (DarusSalam)