“This is the word of the LORD to Zerubbabel: ‘Not by might, nor by power, but by My Spirit,’ says the LORD of hosts. ‘Who are you, O great mountain? Before Zerubbabel you shall become a plain! … The hands of Zerubbabel have laid the foundation of this temple; his hands shall also finish it… For who has despised the day of small things? For these seven rejoice to see the plumb line in the hand of Zerubbabel'” (Zechariah 4).
This is a plumb line:
This is the temple: