Joshua 23:7-16

7 so that you may not be mixed with these nations left here among you, or make mention of the names of their gods, or swear by them, or serve them, or bow yourselves down to them,
8 but hold fast to the Lord your God, as you have done to this day.
9 For the Lord has driven out before you great and strong nations; and as for you, no one has been able to withstand you to this day.
10 One of you puts to flight a thousand, since it is the Lord your God who fights for you, as he promised you.
11 Be very careful, therefore, to love the Lord your God.
12 For if you turn back, and join the survivors of these nations left here among you, and intermarry with them, so that you marry their women and they yours,
13 know assuredly that the Lord your God will not continue to drive out these nations before you; but they shall be a snare and a trap for you, a scourge on your sides, and thorns in your eyes, until you perish from this good land that the Lord your God has given you.
14 "And now I am about to go the way of all the earth, and you know in your hearts and souls, all of you, that not one thing has failed of all the good things that the Lord your God promised concerning you; all have come to pass for you, not one of them has failed
15 But just as all the good things that the Lord your God promised concerning you have been fulfilled for you, so the Lord will bring upon you all the bad things, until he has destroyed you from this good land that the Lord your God has given you.
16 If you transgress the covenant of the Lord your God, which he enjoined on you, and go and serve other gods and bow down to them, then the anger of the Lord will be kindled against you, and you shall perish quickly from the good land that he has given to you."