بَارَكَ اللَّهُ لَكَ، وَبَارَكَ عَلَيْكَ، وَجَمَعَ بَيْنَكُمَا فِي خَيْرٍ
Barakallahu laka, wa baraka 'alayka, wa jama'a baynakuma fi khayr
Allah akubariki, akuteremshie baraka, na awaunge nyinyi wawili katika kheri.
Say to newlyweds after marriage
The Prophet (PBUH) would say this dua for newlyweds, asking Allah to bless their union.