'Heads' in the Bible

Shave your heads, and cut off your hair for the children of your delight. Enlarge your baldness like the vulture; for they have gone into captivity from you!

I said, "Please listen, you heads of Jacob, and rulers of the house of Israel: Isn't it for you to know justice?

Please listen to this, you heads of the house of Jacob, and rulers of the house of Israel, who abhor justice, and pervert all equity.