Ezekiel 21:5

That all flesh may know that I the Lord have drawn forth my
sword out of his sheath
The same with kindling a fire in Judea, (See Gill on Ezekiel 20:48): it shall not return any more;
that is, into its sheath, until it has done all its work; meaning that the Chaldean army should not return to their own land until they had executed the whole will of God upon the Jews; this is the fire that should not be quenched, ( Ezekiel 20:48 ) and here ends the explanation of the said prophecy.