once
بَارَكَ اللَّهُ لَكَ، وَبَارَكَ عَلَيْكَ، وَجَمَعَ بَيْنَكُمَا فِي خَيْرٍ
Edition transliteration
Barakal-lahu lak, wabaraka AAalayk, wajamaAAa baynakuma fee khayr.
Meaning
May Allah bless for you (your spouse) and bless you, and may He unite both of you in goodness.
Source and references
Hisn al-Muslim, entry 190.The reference is copied from the edition; separate editorial verification is not complete yet.
Source edition: Fortress of the Muslim. Open source ↗