Song of Solomon 8:6-8

⁶Set 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: the coals thereof are coals of fire, which hath a most vehement flame.

⁷Many waters cannot quench love, neither can the floods drown it: if a man would give all the substance of his house for love, it would utterly be contemned.

⁸We have a little sister, and she hath no breasts: what shall we do for our sister in the day when she shall be spoken for?