Genesis 50:11

And when the inhabitants of the land, the Canaanites, saw the mourning in the floor of Atad, they said, This is a grievous mourning to the Egyptians: wherefore the name of it was called Abel–mizraim, which is beyond Jordan.

Cross-reference

Genesis 50:10 describes the mourning that gives the place its name 'Abel-mizraim' in verse 11—direct sequential connection.

Genesis 34:30 uses the exact phrase 'inhabitants of the land, the Canaanites and the Perizzites', directly echoing the same population.

Genesis 10:15-19 lists the Canaanite tribes, identifying the 'Canaanites' who observed the mourning in Gen 50:11.

Genesis 13:7 also notes Canaanites and Perizzites dwelling in the land at that time, same inhabitants as here.

Deuteronomy 11:30 describes land 'beyond the Jordan' inhabited by Canaanites—same region as Abel-mizraim.