Who said There is a prodigious danger in the seeking out of loose spirits from crucible?

The quote "There is a prodigious danger in the seeking out of loose spirits from crucible" is from the play "The Tempest" by William Shakespeare. It is said by the character Prospero, who is the rightful Duke of Milan and has been exiled to a remote island. In the play, Prospero uses magic and spirits to control the events on the island and eventually restore his power. The quote suggests that there is a danger in seeking out and using powerful magical forces without proper knowledge and control, as it can lead to unintended consequences.