Zechariah 6:15

they. shall come: i.e. those future builders, of whom these were. type. Compare Isaiah 60:10.

And this, &c.. And it shall come to pass: i.e. the promise and prophecy in the former part of this verse.

if ye will, &c. This condition was not fulfilled; for the command to "repent" (the one condition of national restoration), given by John the Baptist (Matthew 3:1; Matthew 3:2); Messiah (Matthew 4:17); and Peter (Acts 2:38; Acts 3:19), was not obeyed: and this promise therefore remains for an obedience that is yet future. The verse therefore is not "left unfinished" as alleged.

God. Hebrew. Elohim. App-4.