About the wood go swifter than the wind,
And Helena of Athens look thou find:
All fancy-sick she is and pale of cheer,
With sighs of love, that costs the fresh blood dear:
By some illusion see thou bring her here:
I’ll charm his eyes against she do appear.

– William Shakespeare

A Midsummer Night’s Dream, Act 3, Scene 2. Oberon sets about fixing Puck’s mistake of applying the charm to the wrong person. The Fairy King plans to put the magic "Love-in-Idleness" flower juice in Demetrius’ eyes. He commands Puck to quickly find Helena, so that Demetrius will fall in love with her when he awakes and sees her.