Demosthenes

And when Demosthenes was amazed at its weight and asked how much it would amount to, Harpalus smiled and said, For you it will amount to twenty talents; and as soon as night was come he sent him the cup with the twenty talents. Now, Harpalus was skilful in detecting the character of a man who had a passion for gold, by means of the look that spread over his face and the glances of his eyes.

For Demosthenes could not resist, but was overcome by the bribe, and now that he had, as it were, admitted a garrison into his house, promptly went over to the side of Harpalus. Next day, after swathing his neck carefully in woollen bandages, he went forth into the assembly; and when he was urged to rise and speak, he made signs that his voice was ruined.