Who says the following and why Peace ho For shame confusion's cure lives not in these confusions heaven and yourself had part in this fair maid?

The quote "Peace ho! For shame, confusion's cure lives not in these confusions. Heaven and yourself had part in this fair maid" is spoken by Friar Laurence in William Shakespeare's play Romeo and Juliet. He is addressing the Capulet and Montague families about the consequences of their feud and the role they played in the tragic deaths of Romeo and Juliet.