Nikah/Marriage is from the sunnah of Rasulullah (sallallahu ‘alayhi wasallam). Whoever practices on the sunnah will become beloved to Allah Ta’ala.
There are many questions surrounding this topic:
When must we the nikah take place?
Who must we marry our daughters to?
Where must the nikah be contracted?
Which nikah will bring the most blessing?
Listen to this lecture delivered by my beloved father, Shaykhul Hadith, Moulana Haroon Abasoomar (rahimahullah) answering all these questions here