Numbers 33:54-56

Amplified Bible

⁵⁴ You shall inherit the land by lot according to your families; to the large tribe you shall give a larger inheritance, and to the small tribe you shall give a smaller inheritance. Wherever the lot falls to any man, that shall be [the location of] his [inheritance]. According to the tribes of your fathers (ancestors) you shall inherit. ⁵⁵ But if you do not drive out the inhabitants of the land from before you, then those you let remain of them will be like pricks in your eyes and like thorns in your sides, and they will attack you in the land in which you live. ⁵⁶ And as I [the Lord] planned to do to them, so I will do to you.’”