What is Jubere?

Legal Definition
Lat. In the civil law. To order, direct or command. Calvin. The word jubeo, (I order,) in a will, was called a "word of direction," as distinguished from "precatory words." Cod. 6, 43, 2. To assure or promise. To decree or pass a law.
-- Black's Law Dictionary
Legal Definition
To order.
-- Ballentine's Law Dictionary