Deuteronomy 14:2; 26:18

14:2  For thou [art] an holy people unto the LORD thy God, and the LORD hath chosen thee to be a peculiar people unto himself, above all the nations that [are] upon the earth.

26:18  And the LORD hath avouched thee this day to be his peculiar people, as he hath promised thee, and that [thou] shouldest keep all his commandments;