Passage
Sing, O daughter of Zion; shout, O Israel; be glad and rejoice with all the heart, O daughter of Jerusalem.
Sing, O daughter of Zion; shout, O Israel; be glad and rejoice with all the heart, O daughter of Jerusalem.
Zephaniah 3:12 I will also leave in the midst of thee an afflicted and poor people, and they shall trust in the name of the LORD.
Zephaniah 3:13 The remnant of Israel shall not do iniquity, nor speak lies; neither shall a deceitful tongue be found in their mouth: for they shall feed and lie down, and none shall make them afraid.
Zephaniah 3:14 Sing, O daughter of Zion; shout, O Israel; be glad and rejoice with all the heart, O daughter of Jerusalem.
Zephaniah 3:15 The LORD hath taken away thy judgments, he hath cast out thine enemy: the king of Israel, even the LORD, is in the midst of thee: thou shalt not see evil any more.
Zephaniah 3:16 In that day it shall be said to Jerusalem, Fear thou not: and to Zion, Let not thine hands be slack.
The verse centers on "sing", "daughter", "zion", "shout", "israel", "glad", "rejoice", and "heart". It is saying that the verse draws attention to "sing" and "daughter", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 13's "The remnant of Israel shall not do..." into verse 15's "The LORD hath taken away thy judgments...", so "sing" and "daughter" belong inside that flow. In Zephaniah context, the local focus is covenant, worship, and faithfulness.
A plain takeaway is to answer the verse's own emphasis on "sing" and "daughter" with trust shaped by these words, not by a vague optimism outside the passage.