'Command' in the Bible

I gave command over Jerusalem to my brother Hanani and Hananiah the commander of the citadel. For he was a faithful man and feared God more than many.

And Joel son of Zicri, their chief officer; and Judah son of Hassenuah, second [in command] over the city.

For [there was] a command of the king concerning them and a regulation concerning the singers, required {day by day}.

And the heads of the Levites: Hashabiah, Sherebiah, Jeshua son of Kadmiel, and their brothers opposite them, to praise and to give thanks by the command of David the man of God, section alongside section.

They kept the responsibility of their God and the responsibility of cleansing, and the singers and gatekeepers, according to the command of David and his son Solomon.