בַּחוּרָ֥יו אָֽכְלָה־אֵ֑שׁ וּ֝בְתוּלֹתָ֗יו לֹ֣א הוּלָּֽלוּ׃
Fire devoured their young men; And their virgins had no marriage-song.
Rashi on Psalms
were not married Heb. לא הוללו. They were not married by being brought into a litter [under] a canopy because the youths died in battle.
Rashi on Psalms
הוּלָלוּ is an expression of nuptials (הִלוּלָא) in Aramaic. Our Sages, however, explained it in reference to Nadab and Abihu (Mid. Ps. 78:18), but I feel uncertain about explaining it that way because he already commenced with the Tabernacle of Shiloh.