Peace of mind makes the body healthy, but jealousy is like a cancer.

Jealousy... is a mental cancer.

More men die of jealousy than of cancer.

The ear of jealousy heareth all things.

Set me as a seal upon thine heart, as a seal upon thine arm; for love is strong as death; jealousy is cruel as the grave.

Jealousy is cruel as the grave: the coals thereof are coals of fire.