Zephaniah 2:1 Gather yourselves together, yes, gather together, O undesirable nation, [2] before the decree is issued, or the day passes like chaff, before the Lord’s fierce anger comes upon you, before the day of the Lord’s anger comes upon you!
God issues a command for Israel to gather together; they are the undesirable nation, the nation “not reckoning itself among the nations,” Numbers 23:9. The prophet Joel proclaimed a similar command, writing, “Consecrate a fast, call a sacred assembly; gather the elders and all the inhabitants of the land into the house of the Lord your God, and cry out to the Lord,” Joel 1:14.