O Allah, unite our hearts and rectify our mutual relations. — Marriage
اللَّهُمَّ أَلِّفْ بَيْنَ قُلُوبِنَا وَأَصْلِحْ ذَاتَ بَيْنِنَا
Transliteration: Allaahumma allif bayna quloobanaa wa aslih dhaata bayninaa
Translation: O Allah, unite our hearts and rectify our mutual relations.
Reference: Abu Dawud 2:86