The Devil can't get out again.

FAUST

Try, then, the open window-pane!

MEPHISTOPHELES

For Devils and for spectres this is law:
Where they have entered in, there also they withdraw.
The first is free to us; we're governed by the second.

FAUST

In Hell itself, then, laws are reckoned?
That's well! So might a compact be
Made with you gentlemen--and binding,--surely?

MEPHISTOPHELES

All that is promised shall delight thee purely;
No skinflint bargain shalt thou see.
But this is not of swift conclusion;
We'll talk about the matter soon.
And now, I do entreat this boon--
Leave to withdraw from my intrusion.

FAUST

One moment more I ask thee to remain,