Dua on Marriage/ Wedding

Abu Hurairah (r.a) said that when the Prophet (pbuh) congratulated a man on his marriage he said:

بَارَكَ اللهُ لَكَ، وَبَارَكَ عَلَيْكَ، وَجَمَعَ بَيْنَكُمَا فِي خَيْر

“Allah bless you, and may He send blessings upon you, and may He unite you both in good.”

(Tirmidhi)