(The). Alfonzo Perez de Guzman (1258-1309). Lope de Vega has celebrated this hero. When besieged, he was threatened with the death of his son, who had been taken prisoner, unless he surrendered. Perez replied by throwing a dagger over the walls, and his son was put to death in his sight.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894