There are several scriptures that teach what is in the title of this post. "Blessed is the nation whose God is The Lord; and the people whom HE hath chosen for an inheritance." Psalm 33:12

"Righteousness exaltelth a nation,but sin is a reproach to any people." Proverbs 14:34

"And the work of righteousness shall be peace and the effect of righteousness, quietness and assurance forever." Isaiah 32: 18