From the Bible:

Gospel of St. John, Chapter 4, Jesus Christ says:

Say not ye, There are yet four months, and then cometh harvest? Behold, I say unto you, Lift up your eyes, and look on the fields; for they are white already to harvest.

From the Bhagavad Gita, sixth Chapter:

Holding the spine firm, the neck and head erect and motionless, let the yogi focus his eyes at the starting place of the nose [the point between the eyebrows]. Let not his gaze roam elsewhere.