Who said For by your leaves you shall not stay alone till Holy Church incorporate two in one?

The line "For by your leaves you shall not stay alone till Holy Church incorporate two in one" is spoken by Friar Laurence in William Shakespeare's play "Romeo and Juliet." This line refers to the idea that the natural elements (leaves) cannot keep one from being alone until they are united in marriage by the church. It reflects the themes of love, unity, and the natural order that permeate the play.