In Judges 2:3, the angel already declared God would not drive out the nations, making this a reiteration of that decree.

Judges 3:3 lists the specific nations left behind — the Philistines, Canaanites, Sidonians, and Hivites — as a direct result.

Judges 3:1 reveals that the nations were left to test Israel, providing the reason behind this decision.

In Joshua 23:13, Joshua warned that leftover nations would become a snare — here that warning becomes reality.

Joshua 13:6 records God's promise to drive out the Sidonians and others — the opposite of His decision here not to.