Sahih Muslim , Book 20, Hadith 4722 (USC-MSA) ⓘ
It has been narrated by Sa'd b. Abu Waqqas that the Messenger of Allah said: The people of the West will continue to triumphantly follow the truth until the Hour is established.
حَدَّثَنَا يَحْيَى بْنُ يَحْيَى، أَخْبَرَنَا هُشَيْمٌ، عَنْ دَاوُدَ بْنِ أَبِي هِنْدٍ، عَنْ أَبِي عُثْمَانَ، عَنْ سَعْدِ بْنِ أَبِي وَقَّاصٍ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " لاَ يَزَالُ أَهْلُ الْغَرْبِ ظَاهِرِينَ عَلَى الْحَقِّ حَتَّى تَقُومَ السَّاعَةُ " .
also referenced under: Book 33, Hadith 253 (In-Book) & Hadith 1925 (Reference)