It was the lark

JULIET
  1   Wilt thou be gone? it is not yet near day:
  2   It was the nightingale, and not the lark,
  3   That pierced the fearful hollow of thine ear;
  4   Nightly she sings on yon pomegranate-tree:
  5   Believe me, love, it was the nightingale.
      ROMEO
  6   It was the lark, the herald of the morn,
  7   No nightingale. Look, love, what envious streaks
  8   Do lace the severing clouds in yonder east.
  9   Night's candles are burnt out, and jocund day
 10   Stands tiptoe on the misty mountain tops.
 11   I must be gone and live, or stay and die.

Source: flickr.com via Lesley on Pinterest