Charles Ellicott Commentary Zechariah 8:14-17

"For thus saith Jehovah of hosts: As I thought to do evil unto you, when your fathers provoked me to wrath, saith Jehovah of hosts, and I repented not; so again have I thought in these days to do good unto Jerusalem and to the house of Judah: fear ye not. These are the things that ye shall do: speak ye every man the truth with his neighbor; execute the judgment of truth and peace in your gates; and let none of you devise evil in your hearts against his neighbor; and love no false oath: for all these are things that I hate, saith Jehovah." — Zechariah 8:14-17 (ASV)

As the Captivity had been brought about by God’s decree, so, too, the Restoration. The people, therefore, need not fear, if only they do that which is righteous in His sight.