'Mercy and Truth' in the Bible

Whereas thou camest but yesterday, should I this day make thee go up and down with us, seeing I go whither I may? return thou, and take back thy brethren; mercy and truth be with thee.

Mercy and truth are met together; Righteousness and peace have kissed each other.

Do they not err that devise evil? But mercy and truth'shall be to them that devise good.

By mercy and truth iniquity is atoned for; And by the fear of Jehovah men depart from evil.