They are thrown to the sword along with my people. Therefore beat your breast

Ezekiel 20:45-21:17
Prophecy against the south: the blazing flame will not be quenched, and every face from south to north will be scorched by it.
They are thrown to the sword along with my people. Therefore beat your breast.
Said to land of Israel : I will draw my sword from its scabbard and cut off from you both the righteous and the wicked.
Cry out and wail, son of man, prophesy and strike your hands together. Let the sword strike twice, even three times. It is a sword for slaughter - a sword for great slaughter, closing in on them from every side.
Babylon, God's sword of Judgment.
God's judgment will sweep across the land from south to north like a forest fire.
The sword of God is drawn against Israel. It is in the hands of the king of Babylon, who will destroy the capital cities of both Ammon and Judah.
Why?
beat your breast: show how sad or guilty you feel in an obvious or public way 捶胸頓足
No way to get it back.
Babylon is God's sword of Judgment. When judgment come, roughteous and wicked both are fall down by the sword. God's wrath on the land both will be cut off..
How?
Fear the Lord and honor the Holy name of the Lord. Do not sad when it is too late to return.