qa.shash is used as a plural command for a nation to gather itself together.

The attested use is a plural imperative calling a nation to gather itself together in Zephaniah 2:1.

1. Gathering together by command · dominant

   In Zephaniah 2:1, the two forms are Hithpolel imperatives addressed to a masculine plural audience in an appeal to the nation; the APB renders the clause, “Assemble yourselves and assemble.”

   Zephaniah 2:1

In the Anselm Project Bible: In Zephaniah 2:1, the APB presents the repeated command as “Assemble yourselves and assemble,”.