Prior to the destruction of Solomon’s temple by the Chaldeans, back when there was an Ark of the Covenant in which holy things could be stored, God occasionally ordered the preservation of certain items: the tablets of the covenant, Aaron’s rod that budded, a jar of manna. Somewhere along the line, two of these went missing, but in their time, they served as reminders to Israel of God’s law, sovereignty and provision.
His eight visions finally completed, Zechariah now receives an object lesson from the Lord, a Messianic illustration to act out in front of witnesses, to be commemorated with the only God-given physical reminder of the Second Temple era.