All adversities formerly attended them when neglecting to build the temple: but now God promises all blessings, as an encouragement to energy in the work.
hands ... strong - be of courageous mind (2Sa 16:21), not merely in building, but in general, as having such bright prospects (Zec 8:13, etc.).
these days - the time that had elapsed between the prophet’s having spoken “these words” and the time (Zec 8:10; compare Hag 2:15-19) when they set about in earnest restoring the temple.
the prophets - Haggai and Zechariah himself (Ezr 5:1, Ezr 5:2). The same prophets who promised prosperity at the foundation of the temple, now promised still greater blessings hereafter.