I remember.

OBERON
That very time I saw,--but thou couldst not,--
Flying between the cold moon and the earth,
Cupid, all arm'd: a certain aim he took
At a fair vestal, throned by the west;
And loos'd his love-shaft smartly from his bow,
As it should pierce a hundred thousand hearts;
But I might see young Cupid's fiery shaft
Quench'd in the chaste beams of the watery moon;
And the imperial votaress passed on,
In maiden meditation, fancy-free.
Yet mark'd I where the bolt of Cupid fell:
It fell upon a little western flower,--
Before milk-white, now purple with love's wound,--
And maidens call it love-in-idleness.
Fetch me that flower, the herb I showed thee once:
The juice of it on sleeping eyelids laid
Will make or man or woman madly dote
Upon the next live creature that it sees.
Fetch me this herb: and be thou here again
Ere the leviathan can swim a league.

PUCK
I'll put a girdle round about the earth
In forty minutes.

[Exit PUCK.]