In truth and in righteousness — This signifies both God's part, and their part; on God's part truth, on their's righteousness, obedience to God's righteous law.
Related Commentaries of Zechariah 8:8
Zechariah 8:8
8 And I will bring them, and they shall dwell in the midst of Jerusalem: and they shall be my people, and I will be their God, in truth and in righteousness.