بَارَكَ اللَّهُ لَكَ، وَبَارَكَ عَلَيْكَ، وَجَمَعَ بَيْنَكُمَا فِي خَيْرٍ
Transliteration
Barakallahu lak, wa baraka 'alayk, wa jama'a baynakuma fi khayr
Translation
May Allah bless you, shower blessings upon you, and unite you both in goodness.
Reference: Abu Dawud 2130