Joshua 23:5

And the LORD your God, he shall expel them from before you, and drive them from out of your sight; and ye shall possess their land, as the LORD your God hath promised unto you.

The Lord your God, he shall expel them from before you ... The actual possessions which God had given were a pledge of the complete fulfillment of His promise in giving them the parts of the country still unconquered. But the accomplishment of the divine promise depended on their inviolable fidelity to God's law-on their keeping resolutely aloof from all familiar contact and intimate connections with the Canaanites, or in any way partaking of their idolatrous sins. In the event of their continuing in stedfast adherence to the cause of God, as happily distinguished, the nation at that time, His blessing would secure them a course of brilliant and easy victories (Leviticus 26:7; Deuteronomy 28:7; Deuteronomy 32:30).