Zephaniah 3:16

14 Sing for joy, O Daughter of Zion; shout aloud, O Israel! Be glad and rejoice with all your heart, O Daughter of Jerusalem!

15 The LORD has taken away your punishment; He has turned back your enemy. Israel’s King, the LORD, is among you; no longer will you fear any harm.

On that day they will say to Jerusalem: “Do not fear, O Zion; do not let your hands fall limp.

17 The LORD your God is among you; He is mighty to save. He will rejoice over you with gladness; He will quiet you with His love; He will rejoice over you with singing.”

18 “I will gather those among you who grieve over the appointed feasts, so that you will no longer suffer reproach.

Do read the surrounding verses too, because the context often says more than a single verse.

Compare

BSB
On that day they will say to Jerusalem: “Do not fear, O Zion; do not let your hands fall limp.
KJV
In that day it shall be said to Jerusalem, Fear thou not: and to Zion, Let not thine hands be slack.
WEB
In that day, it will be said to Jerusalem, “Don’t be afraid, Zion. Don’t let your hands be weak.”
ASV
In that day it shall be said to Jerusalem, Fear thou not; O Zion, let not thy hands be slack.
DARBY
In that day it shall be said to Jerusalem, Fear not; Zion, let not thy hands be slack.
BLB
On that day it will be said to Jerusalem: “Do not fear, O Zion, do not let your hands be slack!
ÅB
På den dag skal det sies til Jerusalem: Frykt ikke! Sion, la ikke dine hender synke!
OTB
På den dagen skal det bli sagt til Jerusalem:
“Vær ikke redd, Sion;
La ikke dine hender bli svake.
B1930
På den dag skal det sies til Jerusalem: Frykt ikke! Sion, la ikke dine hender synke!

Study notes (Tyndale)

Original text and word study

Cross references