Matthew 6:22-23 King James Version (KJV)
22 The light of the body is the eye: if therefore thine eye be single, thy whole body shall be full of light.
23 But if thine eye be evil, thy whole body shall be full of darkness. If therefore the light that is in thee be darkness, how great is that darkness!
Luke 11:34-35 King James Version (KJV)
34 The light of the body is the eye: therefore when thine eye is single, thy whole body also is full of light; but when thine eye is evil, thy body also is full of darkness.
35 Take heed therefore that the light which is in thee be not darkness.