Genesis 8:7

And he sent forth a raven, which went forth to and fro, until the waters were dried up from off the earth.

Ver. 7. And he sent forth a raven.] Which when it is made tame, though it delights in dead carcasses, whereof Noah knew the earth was now full, yet doth not easily forget its station, but returns thereto, when nature is satisfied.

Which went forth to and fro.] Fluttered about the ark, but kept out of it. Manet foris cum voce corvina, qui non habet simplicitatem columbinam. (August.)