Zechariah 8:9

Thus saith the Lord of hosts, Let your hands be strong, full of good courage for doing the work of the Lord, ye that hear in these days these words by the mouth of the prophets, namely, Haggai and Zechanab, which were in the day that the foundation of the house of the Lord of hosts was laid, that the Temple might be built. These prophets had begun their activity at the time when the foundation of the second Temple had already been built, and the good effects of their preaching were now apparent in the nation.