Deuteronomy 26:18-19

18Today the Lord has accepted you to be his own special people. He already promised that he would do that. As his people, you must obey all his commands.

19If you do that, he will make you greater than all the other nations that he has made. Other nations will see that you are great. They will praise you and give you honour. You will be a nation that belongs to the Lord your God as his own special people. He has promised to do this.