Judges 3:1 in the King James Version
Now these are the nations which the LORD left, to prove Israel by them, even as many of Israel as had not known all the wars of Canaan;
Context
1 Now these are the nations which the LORD left, to test Israel by them, even as many as had not known all the wars of Canaan;
2 only that the generations of the children of Israel might know, to teach them war, at least those who knew nothing of it before: