Zephaniah says the remnant of Israel will do no injustice and speak no lies. He says no deceitful tongue will be found in their mouth, and they will graze and lie down with none to make them afraid (Zephaniah 3:13).
In Zephaniah 3:11–13, the prophet describes a future “day” when public disgrace tied to past rebellion will no longer define the people, because the proud within the community will be removed. What remains is a small, vulnerable group marked by humility and dependence on Yahweh. These verses come near the end of Zephaniah’s final chapter, after sharp accusations about Jerusalem’s leaders and failures (3:1–7) and a sweeping announcement of a coming decisive intervention (3:8).
Zephaniah 3:11–13 describes a future turning point (“in that day”) in which the community’s public disgrace tied to its prior rebellion no longer defines it. The text links this change to Yahweh acting within the community: the “proudly exulting ones” are removed from its midst, and “haughty” behavior is no longer at home on Yahweh’s holy mountain.
A careful answer keeps the immediate passage, the book's argument, and the whole-Bible storyline together, so the question is answered in context instead of as a detached idea.
Start with Zephaniah 3:13, then read the surrounding section so the answer stays connected to the passage's flow.
13The remnant of Israel will not do iniquity, nor speak lies, neither will a deceitful tongue be found in their mouth, for they will feed and lie down, and no one will make them afraid."