Narrated [Abu Hurairah (RA)]:

When the Prophet (ﷺ) congratulated a man on his marriage he would say, "Allah bless for you (your spouse), grant you blessing, and join you together in goodness." [Reported by Ahmad and al-Arba'a. at-Tirmidhi, Ibn Khuzaimah and Ibn Hibban graded it Sahih (authentic)].

وَعَنْهُ ; أَنَّ اَلنَّبِيَّ ‏- صلى الله عليه وسلم ‏-كَانَ إِذَا رَفَّأَ إِنْسَانًا إِذَا تَزَوَّجَ قَالَ : { بَارَكَ اَللَّهُ لَكَ , وَبَارَكَ عَلَيْكَ , وَجَمَعَ بَيْنَكُمَا فِي خَيْرٍ } رَوَاهُ أَحْمَدُ , وَالْأَرْبَعَةُ , وَصَحَّحَهُ اَلتِّرْمِذِيُّ , وَابْنُ خُزَيْمَةَ , وَابْنُ حِبَّانَ [1]‏ .‏