Numbers 33:56

Moreover, it shall come to pass that I shall do unto you as I thought to do unto them, namely, drive them out of the land and destroy them. This warning was repeated by Joshua, Joshua 23:13, and was fulfilled in the history of both Israel and Judah. It is the will of God to this day that Christians, although living in the midst of the godless children of the world, should keep themselves altogether uncontaminated of the world.