Judges 3:2NET Bible
He left those nations simply because he wanted to teach the subsequent generations of Israelites, who had not experienced the earlier battles, how to conduct holy war.
Related Verses
Genesis 2:3
God blessed the seventh day and made it holy because on it he ceased all the work that he had been doing in creation.
Genesis 3:10
The man replied, "I heard you moving about in the orchard, and I was afraid because I was naked, so I hid."
Genesis 3:14
The LORD God said to the serpent, "Because you have done this, cursed are you above all the wild beasts and all the living creatures of the field! On your belly you will crawl and dust you will eat all the days of your life.
Genesis 3:17
But to Adam he said, "Because you obeyed your wife and ate from the tree about which I commanded you, 'You must not eat from it,' cursed is the ground thanks to you; in painful toil you will eat of it all the days of your life.
Genesis 3:20
The man named his wife Eve, because she was the mother of all the living.