In case a boy or a girl has not been able to get married & wishes to do so Recite foll :-
-Recite surah al Ahzaab (chapter 33) regularly. -Recite surah al Mumtahinah (chapter 60) five times daily, -Recite surah at Taha (chapter 20) and blow breath on a glass of water and let the girl drink it.
-Recite verse 36 of Yasin 100 times before salat of tahajjud for 40 days “subh’aanallad’ee khalaqal azwaaja kullahaa mimmaa tumbitul arz’u wa min anfusihim wa mimmaa laa ya’lamoon, ”
-Recite Surah Furqan Ayat 74,75 & 76 21 times for 3 days & pray for nikah
source:duas.org
Islamic Duas and Supplications 