Deuteronomy 26:3

26:3 You must go to the priest in office at that time and say to him, “I declare today to the Lord your God that I have come into the land that the Lord promised to our ancestors to give us.”

Deuteronomy 26:17-19

26:17 Today you have declared the Lord to be your God, and that you will walk in his ways, keep his statutes, commandments, and ordinances, and obey him. 26:18 And today the Lord has declared you to be his special people (as he already promised you) so you may keep all his commandments. 26:19 Then he will elevate you above all the nations he has made and you will receive praise, fame, and honor. You will be a people holy to the Lord your God, as he has said.