Raise a standard toward Zion, flee for safety, stay not, for I bring disaster from the north, and great destruction.
The words אל-תעמדו, al-tomedu, may be explained in two ways, — “Stand not,” that is, “Hasten quickly,” as it is the case with those in extreme fear; or, “Ye shall not stand,” that is, “Though ye may seek a firm position on Mount Sion, ye shall not yet be able to continue there.” The first exposition appears to me the best, as it is more suitable to the context.
God's usual method is to warn before he wounds. In these verses, accordingly, God gives notice to the Jews of the general desolation that would shortly be brought upon them by a foreign invasion. This must be declared and published in all the cities of Judah and streets of Jerusalem, that all might hear and fear, and by this loud alarm be either brought to repentance or left inexcusable.
Commenting on Jeremiah 4:5-18
Set up the standard toward Zion,.... Not on the tower of Zion, as Kimchi interprets it; but on some high place, pointing to Zion, and directing the country people to flee thither for safety; for the setting up of the standard here is not for enlisting of soldiers in order to fight, but as a sign of danger, and a direction where to flee from...