Shiva’s marriage with Parvati.
See also Triyuginarayan
Read the myth here
http://hindumythologyforgennext.blogspot.com/2011/11/how-lord-shiva-married-goddess-parvati.html
the poetry here
Parvati Mangala of Tulsidas
https://tulsidas-ram-books.weebly.com/uploads/2/1/7/4/21746472/35_parvati_mangal_of_goswami_tulsidas.pdf