Probably from an unused root meaning to gather; an assembly -- company.
H3862. lahaqah
[לַהֲקָה] noun feminine dubious; according to ᵑ7 ᵑ6 ᵐ5 Aq Symm band, company (perhaps by transposing from קְהִלָּה, compare Thes (קַהֲלָה) The Klo Bu; see also HPS). — הַנְּבִיאִים לַהֲקִת 1 Samuel 19:20.