NET

6 The Beloved to Her Lover: Set me like a cylinder seal over your heart, like a signet on your arm. For love is as strong as death, passion is as unrelenting as Sheol. Its flames burst forth, it is a blazing flame.

Darby

6 Set me as a seal upon thy heart, As a seal upon thine arm: For love is strong as death; Jealousy is cruel as Sheol: The flashes thereof are flashes of fire, Flames of Jah.

KJV

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