'Second in command' in the Bible

Then he provided him with a chariot as his second-in-command, outfitted with a group of people who shouted out in front of him, "Bow your knees!" And that's how Pharaoh set Joseph over the entire land of Egypt.

Jonathan told him, "Don't be afraid. My father Saul won't find you, and you will be king over Israel. I'll be your second-in-command. My father Saul also knows this."

Zikri, an Ephraimite warrior, killed the king's son Maaseiah, Azrikam, the supervisor of the palace, and Elkanah, the king's second-in-command.

Joel son of Zicri was the officer in charge of them, and Judah son of Hassenuah was second-in-command over the city.

For Mordecai the Jew [was] second-in-command to King Ahasuerus. [He was] great for the Jews and popular with many of his brothers, for he sought good for his people, {interceding for the welfare of all his descendants}.