"Cry My Eyes Out"
Context: Before letting Sancho go to carry a letter to Dulcinea begging her to pity his distress, and another to Don Quixote's niece, telling her to deliver to his squire three of the five asses he possesses, in payment for the one stolen by Ginés Passamonte, the Knight demands that his squire witness some acts of his penance. Sancho is very unwilling.
". . . Good sir," quoth Sancho, "as you love me, don't let me stay to see you naked; 'twill grieve me so to the heart, that I shall cry my eyes out; and I have blubbered and howled but too much since yesternight for the loss of my ass. . . ."