O Allah, bless our marriage and unite our hearts. — Marriage
اللَّهُمَّ بَارِكْ فِي زَوَاجِنَا وَأَلِّفْ بَيْنَ قُلُوبِنَا
Transliteration: Allaahumma baarik fee zawaajinaa wa allif bayna quloobanaa
Translation: O Allah, bless our marriage and unite our hearts.
Reference: General supplication