Thou art armed, Gloucester. Let the trumpet sound. / If none appear to prove upon thy person / Thy heinous, manifest, and many reasons, / There is my pledge. [He throws down a glove.] / I'll make it on thy heart, / Ere I taste bread, thou art in nothing less / Than I have here proclaimed thee

This is an excerpt from William Shakespeare's King Lear. The lines are spoken by Albany.

Explanation:

Here Albany confronts Gloucester. Here is a more modern version:

"You've got a sword, Gloucester. Blow the trumpets. If nobody else comes to challenge you and prove what an abominable traitor you have been, I'll have to challenge you myself. (he throws down his glove) I'll prove soon enough that you're just as wicked as I say you are."