Matthew 6:22
The eye is the light of the body: if therefore thine eye be single, thy whole body shall be full of light.
Luke 11:34-36
The eye is the lamp of the body: therefore when thine eye is single, thy whole body is full of light, but when thine eye is evil, thy body also is full of darkness.
2 Corinthians 11:3
But I fear lest as the serpent deceived Eve through his subtilty, so your minds should be corrupted from simplicity toward Christ.
Colossians 3:22
Servants, obey in all things your masters according to the flesh; not with eye-service, as men-pleasers, but in singleness of heart, fearing God.
Acts 2:46
And continuing daily with one accord in the temple, and breaking the bread at home, they ate their meat with gladness and singleness of heart,
Ephesians 6:5
Servants, obey your masters according to the flesh, with fear and trembling, in singleness of heart, as unto the Lord: