2 Samuel 23:7
The man who touches them must be armed with iron
What it says
Whoever touches such thorns must use iron and a spear shaft, and they are burned where they lie.
What it is doing
It completes the song with an image of decisive removal.
In context
1These are the last words of David: 2The Spirit of the LORD spoke through me; 3The God of Israel spoke; 4is like the light of the morning 5Is not my house right with God? 6But the worthless are all like thorns raked aside, 7The man who touches them must be armed with iron