There is no fixed transmitted wording called 'the dua for marriage', but there are comprehensive supplications that include this request and more — and they are better than an invented text passed around.
Among the most complete is the supplication of Musa, alone, afraid and destitute: 'My Lord, I am in need of whatever good You send down to me' — and within a few verses he was granted safety, a wife and work. And the supplication of the servants of the Most Merciful: 'Our Lord, grant us from among our spouses and offspring comfort to our eyes.'
The authentic congratulation is: 'May Allah bless you, and send blessings upon you, and join you both in good' — not the pre-Islamic formula the Prophet ﷺ forbade.
رَبِّ إِنِّي لِمَا أَنزَلْتَ إِلَيَّ مِنْ خَيْرٍ فَقِيرٌ
Rabbi inni lima anzalta ilayya min khayrin faqir.
My Lord, I am in need of whatever good You send down to me.
رب إني لما أنزلت إلي من خير فقير
رَبَّنَا هَبْ لَنَا مِنْ أَزْوَاجِنَا وَذُرِّيَّاتِنَا قُرَّةَ أَعْيُنٍ وَاجْعَلْنَا لِلْمُتَّقِينَ إِمَامًا
Rabbana hab lana min azwajina wa dhurriyyatina qurrata a'yunin waj'alna lil-muttaqina imama.
Our Lord, grant us from among our spouses and offspring comfort to our eyes, and make us leaders for the righteous.
ربنا هب لنا من أزواجنا وذرياتنا قرة أعين واجعلنا للمتقين إماما
بَارَكَ اللَّهُ لَكَ، وَبَارَكَ عَلَيْكَ، وَجَمَعَ بَيْنَكُمَا فِي خَيْرٍ
Barakallahu lak, wa baraka 'alayk, wa jama'a baynakuma fi khayr.
May Allah bless you, and send blessings upon you, and join you both in good.
بارك الله لك، وبارك عليك، وجمع بينكما في خير
The Khalily app
The Khalily app reminds you at the right time and keeps your routine with you wherever you are.
No fixed wording is transmitted under that name. Comprehensive supplications such as 'Rabbi inni lima anzalta ilayya min khayrin faqir' cover it.
