Joshua 23:8

4 See, I have allotted as an inheritance to your tribes these remaining nations, including all the nations I have already cut off, from the Jordan westward to the Great Sea.

5 The LORD your God will push them out of your way and drive them out before you, so that you can take possession of their land, as the LORD your God promised you.

6 Be very strong, then, so that you can keep and obey all that is written in the Book of the Law of Moses, not turning aside from it to the right or to the left.

7 So you are not to associate with these nations that remain among you. You must not call on the names of their gods or swear by them, and you must not serve them or bow down to them.

8 Instead, you shall hold fast to the LORD your God, as you have done to this day.

9 The LORD has driven out great and powerful nations before you, and to this day no one can stand against you.

10 One of you can put a thousand to flight, because the LORD your God fights for you, just as He promised.

11 Therefore watch yourselves carefully, that you love the LORD your God.

12 For if you turn away and cling to the rest of these nations that remain among you, and if you intermarry and associate with them,

Read all of Joshua 23