Numbers 33:55

Pricks in your eyes, and thorns in your sides— God here declares to the Israelites, that if they mix themselves with the Canaanites, whom they suffered to remain in the land, those Canaanites should be the instruments, in his hand, to chastise them, and should cause them evils as dolorous in their kind as those which arise from a thorn in the eye, or poignard in the side. See Ezekiel 28:24. Joshua intimated the same threatening to them before he died, Judges 23:13 of which an angel put them in mind, Judges 2:3. And so it came to pass, as we read there, Numbers 33:13 and throughout that whole book.