20 Go, my people, enter your rooms and shut the doors behind you; hide yourselves for a little while until his wrath has passed by.

Read Isaiah 26:20 Using Other Translations

Come, my people, enter thou into thy chambers, and shut thy doors about thee: hide thyself as it were for a little moment, until the indignation be overpast.
Come, my people, enter your chambers, and shut your doors behind you; hide yourselves for a little while until the fury has passed by.
Go home, my people, and lock your doors! Hide yourselves for a little while until the LORD ’s anger has passed.