Recite:
بَارَكَ اللَّهُ لَكَ وَبَارَكَ عَلَيْكُمَا وَجَمَعَ بَيْنَكُمَا فِي خَيْرٍ
"May Allah grant you Barakaat (blessings) and descend His blessings on both of you and keep you united".
(Ahmed, Tirmidhi)
In the Name of Allah, the All-Merciful, the All-Compassionate. Bismi'llahi 'r-Rahmani 'r-Rahim. Praise be to Allah, the All-Powerful, the All-Knowing, the All-Wise, the All-Generous, the Noble, the Compassionate Lord, the One who revealed the Wise Remembrance and the Glorious Qur'an to the Envoy, whom He sent to convey the Right Religion and the Straight Path.