Single
2 verses in 2 books of the King James Bible.
By Book
Every Occurrence
Matthew 6:22The light of the body is the eye: if therefore thine eye be single, thy whole body shall be full of light.
Luke 11:34The 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.