M.I Nigeria limited v moses  Omoduemuke CA/ B/376/06 .Whether jurisdiction is fundamental to the excercise of power by a court 

"There is no doubt that Jurisdiction is fundamental to the exercise of power by a court in relation to matters before it or as being the life wire to the exercise by a court of its power of adjudication. It is the law that in its determination, the processes to consider is the pleadings of the plaintiff. It is the case of the plaintiff that shows whether the court has jurisdiction or not.

Source: law pavilion