Zechariah 8:9

8:9 “The Lord who rules over all also says, ‘Gather strength, you who are listening to these words today from the mouths of the prophets who were there at the founding of the house of the Lord who rules over all, ¹  so that the temple might be built.

Zechariah 8:13

8:13 And it will come about that just as you (both Judah and Israel) were a curse to the nations, so I will save you and you will be a blessing. Do not be afraid! Instead, be strong!’

[8:9]  ¹ sn These prophets who were there at the founding of the house of the Lord who rules over all included at least Haggai and Zechariah, and perhaps others. The founding referred to here is not the initial laying of the temple’s foundations in 536 b.c. (Ezra 3:8) but the resumption of work two years before the time of the present narrative (i.e., in 520 b.c.), as vv. 10-12 make clear.