Joshua 12:8
In the mountains, and in the valleys, and in the plains, and in the springs, and in the wilderness, and in the south country; the Hittites, the Amorites, and the Canaanites, the Perizzites, the Hivites, and the Jebusites:
Cross-reference
Joshua 9:1 lists the exact same six peoples (Hittites, Amorites, etc.) in a similar geographical description.
Joshua 10:40 lists the same regions (hill country, Negeb, lowland, slopes) as conquered, providing a parallel account.
Joshua 11:16 also lists hill country, lowland, Arabah, etc., showing consistent summary of the land taken.
Joshua 13:4 lists Canaanites not yet conquered, showing this list is partial — the conquest continues.
Genesis 15:18-21 promises the land of these peoples to Abraham; Joshua 12:8 records its fulfillment.
Exodus 3:8 promises the land of these six nations; Joshua 12:8 shows the land now taken.
Exodus 23:23 promises the angel will bring Israel to these nations and blot them out; Joshua 12:8 records the land of those nations.
Exodus 23:28-31 promises driving out these peoples; Joshua 12:8 lists their land as conquered.
Deuteronomy 7:1 promises clearing away these nations; Joshua 12:8 lists their land as taken.
Genesis 10:15 traces Canaan's sons, including Heth, ancestor of the Hittites listed here — linking conquest to genealogy.
Genesis 10:19 defines Canaanite territory; this verse records conquest of that exact region, fulfilling the land promise.
In Deuteronomy 9:1, God promises to dispossess mighty nations — this list of conquered peoples fulfills that promise.