In chapter 23 of the book of Joshua we find how God through Joshua exhorts His people to keep His words and not contaminate with other nations, since that would serve as a stumbling. Throughout the Scriptures God always guided His people so that they would not allow themselves to be influenced by other nations, in the same way He does not want us to allow ourselves to be clothed by the system of this world.
After God had exhorted the people of Israel to keep His commandments, to fulfill the laws of Moses and not to mingle with the other nations, He reminded them of all the good words He had said about them and how each one was fulfilled to the letter:
Now I am about to go the way of all the earth. You know with all your heart and soul that not one of all the good promises the Lord your God gave you has failed. Every promise has been fulfilled; not one has failed.