On that day,’ declares the LORD of hosts, ‘I will take you, Zerubbabel, son of Shealtiel, My servant,’ declares the LORD, ‘and I will make you like a signet ring, for I have chosen you,'” declares the LORD of hosts. [Haggai 2:23]
Zerubbabel was the governor of Judah. At that time, Judah was no longer a kingdom, but a province or state. So Zerubbabel was probably the highest ranking officer in Judah. Zerubbabel was in a way a shadow of Christ. He was a son of David (see Matthew 1:12, you can see Jesus’ name a few verses later) chosen by the LORD to be the leader of the Jews, and the LORD would make him as a signet. This is significant as kings of that time signed their edicts with their signet rings. Thus this shows the authority the LORD entrusted Zerubbabel with. Christ is the signet on God’s right hand, and all power is given to Him.