"cause to curse the Dauphin’s soul"

The judge is misquoting Shakespeare:

And some are yet ungotten and unborn
That shall have cause to curse the Dauphin's scorn.

Henry V Act 1: Scene 2


The young King says this after the Dauphin (heir to the throne of France) has answered his claim on French dukedoms by sending him a present of tennis balls.  Henry goes on to win the Battle of Agincourt and seize the French crown for himself.