Jeremias 4:5

5 Declare ye in Juda, and let it be heard in Jerusalem: say ye, Sound the trumpet in the land; cry ye aloud: say ye, Gather yourselves together, and let us enter into the fortified cities.

Jeremias 4:5 Meaning and Commentary

Jeremiah 4:5

Declare ye in Judah, and publish in Jerusalem, and say
Exhortations to repentance being without effect in general, though they might have an influence on some few particular persons, the Lord directs the prophet to lay before the people a view of their destruction as near at hand; who calls upon some persons as a sort of heralds, to publish and declare in the land of Judea, and in Jerusalem the metropolis of it, what follows: blow ye the trumpet in the land;
as an alarm of an approaching enemy, and of an invasion by him, and of danger from him; and this was to be done, not in order to gather together, and put themselves in a posture of defence, to meet the enemy, and give him battle; but to get together, that were in the fields, and in country villages, and hide themselves from him: cry, gather together, and say;
or cry with a full mouth, with a loud voice, that all might hear; which shows imminent danger: assemble yourselves and let us go into the defenced cities;
such as Jerusalem, and others, where they might think themselves safe and secure; see ( Matthew 24:16 ) .

Jeremias 4:5 In-Context

3 For thus saith the Lord to the men of Juda, and to the inhabitants of Jerusalem, Break up fresh ground for yourselves, and sow not among thorns.
4 Circumcise yourselves to your God, and circumcise your hardness of heart, ye men of Juda, and inhabitants of Jerusalem: lest my wrath go forth as fire, and burn, and there be none to quench it, because of the evil of your devices.
5 Declare ye in Juda, and let it be heard in Jerusalem: say ye, Sound the trumpet in the land; cry ye aloud: say ye, Gather yourselves together, and let us enter into the fortified cities.
6 Gather up and flee to Sion: hasten, stay not: for I will bring evils from the north, and great destruction.
7 The lion is gone up from his lair, he has roused to the destruction of the nations, and has gone forth out of his place, to make the land desolate; and the cities shall be destroyed, so as to be without inhabitant.

The Brenton translation of the Septuagint is in the public domain.