In the name of Allah, the Most Gracious & the Most Merciful
Duas
Dua for the Couple
May Allah bless you and bestow blessings upon you.
بارَكَ اللّهُ لَك، وَبارَكَ عَلَـيْك، وَجَمَعَ بَيْـنَكُما في خَـيْر
Bārakallāhu laka wa bāraka ‘alayka wa jama’a baynakumā fī khayr.
Once, Al-Hasan reported: “Aqil bin Abi Talib (ﷺ) got married to a woman from Banu Jusham. People wished him well, saying, ‘May you live happily and have many sons.’ Aqil responded by saying, ‘Say what the Messenger of Allah used to say: Barak Allahu fikum, wa baraka lakum.’ It means, ‘May Allah bless you and bestow blessings upon you.
You can visit the original source for more details:
https://sunnah.com/abudawud:2130
https://salatallayl.com/dua-for-newly-married-couple/
For all the days along the way