Revelation 3:14-16

14“To the angel (divine messenger) of the church in Laodicea write: These are the words of the Amen, the trusted and faithful and true Witness, the Beginning and Origin of God’s creation:

15‘I know your deeds, that you are neither cold (invigorating, refreshing) nor hot (healing, therapeutic); I wish that you were cold or hot.

16So because you are lukewarm (spiritually useless), and neither hot nor cold, I will vomit you out of My mouth [rejecting you with disgust].