“And the Lord was with Iudah, and hee draue out the inhabitants of the mountaine, but could not driue out the inhabitants of the valley, because they had charets of yron.”
1611 King James Version (KJV)
1:19 Could not drive - Because of their unbelief, whereby they distrusted God's power to destroy those who had chariots of iron, and so gave way to their own fear and sloth, whereby God was provoked to withdraw his helping hand.