HAMLET.
Never make known what you have seen tonight.

HORATIO and MARCELLUS.
My lord, we will not.

HAMLET.
Nay, but swear’t.

HORATIO.
In faith, my lord, not I.

MARCELLUS.
Nor I, my lord, in faith.

HAMLET.
Upon my sword.

MARCELLUS.
We have sworn, my lord, already.

HAMLET.
Indeed, upon my sword, indeed.

GHOST.
[Cries under the stage.] Swear.

HAMLET.
Ha, ha boy, sayst thou so? Art thou there, truepenny?
Come on, you hear this fellow in the cellarage.
Consent to swear.