Song of Songs 8:6-7

⁶Set me as a seal upon your heart, as a seal upon your arm; for love is strong as death; jealousy is cruel as the grave, her shafts are shafts of fire, even the flames thereof.

⁷Much water will not be able to quench love, and rivers shall not drown it; if a man would give all his substance for love, men would utterly despise it.