Song of Songs 8:6, 7

Place me like a seal over your heart, like a seal on your arm. For love is as strong as death, its jealousy  as enduring as the grave. Love flashes like fire, the brightest kind of flame. Many waters cannot quench love, nor can rivers drown it. If a man tried to buy love with all his wealth, his offer would be utterly scorned. (Song of Songs 8:6, 7 NLT)