When the Prophet ﷺ congratulated a man on his marriage, he said: May Allah bless for you, and may He bless on you, and combine both of you in good (works). (Using translation from Abū Dāʾūd 2130)
عَنِ النَّبِيِّ ﷺ أَنَّهُ كَانَ إِذَا رَفَّأَ لِإِنْسَانٍ قَالَ «بَارَكَ اللَّهُ لَكَ وَبَارَكَ عَلَيْكَ وَجَمَعَ بَيْنَكُمَا فِي خَيْرٍ»