Zechariah 8:6
Thus saith the LORD of hosts; If it be marvellous in the eyes of the remnant of this people in these days, should it also be marvellous in mine eyes? saith the LORD of hosts. Thus saith the LORD of hosts; If it be marvellous in the eyes of the remnant of this people in these days, should it also be marvellous in mine eyes? saith the LORD of hosts.
The prophecy containing the verse was given in 520 and 518 B.C. and consists chiefly of visions meant to encourage confidence and earnest effort. The verse belongs to the prophecy about the reformation of God's people under Zerubbabel, which was a type of future reformations, with the surrounding chapters using figures and symbols to show the nations and God's power to save. The prophecy looks beyond the restoration from Babylon to the final restoration when Christ comes.
The marvelous thing confirmed is that very aged people would yet dwell safely in the streets of Jerusalem and its streets would be full of young people, showing the protection and tranquillity God would extend to the city on condition of continued obedience. The Lord had returned to dwell in Jerusalem, and his blessing for Zion and Jerusalem would be as great as their affliction had been. What seems astonishing to the remnant remaining in the land in those days because of the troubles they were suffering is not astonishing to the Lord of hosts, and the promised peace, restoration of Zion, and blessing for Jerusalem are beyond human expectation but not beyond his power to accomplish.