Song of Solomon 8:6

Set me as a seal upon Thine heart, like a signet-ring worn on a cord over the heart, as a seal upon Thine arm; for love, in its essence, in the absoluteness of its perfection, is strong as death; jealousy is cruel as the grave, hard and unyielding in persistence; the coals thereof are coals of fire, which hath a most vehement flame, its fiery flames are a blaze of Jehovah.