Charles Spurgeon Commentary Zechariah 8:12-15

"For [there shall be] the seed of peace; the vine shall give its fruit, and the ground shall give its increase, and the heavens shall give their dew; and I will cause the remnant of this people to inherit all these things. And it shall come to pass that, as ye were a curse among the nations, O house of Judah and house of Israel, so will I save you, and ye shall be a blessing. Fear not, [but] let your hands be strong. 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." — Zechariah 8:12-15 (ASV)

And I will cause the remnant of this people to possess all these things. And it shall come to pass, that as ye were a curse among the heathen, O house of Judah, and house of Israel; so will I save you, and ye shall be a blessing: fear not, but let your hands be strong. For thus saith the LORD of hosts; As I thought to punish you, when your fathers provoked me to wrath, saith the LORD of hosts, and I repented not: so again have I thought in these days to do well unto Jerusalem and to the house of Judah: fear ye not.

Did you notice the repetition of the exhortation, Fear not, and then again, Fear ye not? The Lord knows how much mischief doubts and fears do to his people, and therefore many a time, in Scripture, he aims a blow at them. Fear nots abound in Scripture; it would be well if you made every one of them into a gallows-tree upon which to hang your unbelief until it died. What is your fear at this moment? What is the cause of your trembling? Fear ye not, says God to you; will you dare to fear after this?