400
This exchange is an example of this type of device.
Sampson: I will show myself a tyrant. When I have fought with the men, I will be cruel with the maids, and cut off their heads.
Gregory: The heads of the maids?
Sampson: Ay, the heads of the maids, or their maidenheads; take it in what sense thou wilt.
What is "a pun"?