Solomon
Song of Solomon 8:6ESV·traditional attribution

Set me as a seal upon your heart, as a seal upon your arm, for love is strong as death, jealousy is fierce as the grave. Its flashes are flashes of fire, the very flame of the LORD.

Geneva Bible Notes Reformed @genevanotes

Set me as a seal upon thy heart, as a seal upon thy arm: for love [is] strong as death; jealousy [is] cruel as the grave: the coals of it [are] coals of fire, [which hath a] most vehement flame. (d) The spouse desires Christ to be joined in perpetual love with him.

Keil & Delitzsch Lutheran @keilanddelitzsch

Sol 8:6-7 After Solomon has thus called to remembrance the commencement of their love-relation, which receives again a special consecration by the reference to Shulamith’s parental home, and to her mother, Shulamith answers with a request to preserve for her this love. 6 Place me as a signet-ring on thy heart, As a signet-ring on thine arm!

Commenting on Song of Solomon 8:6-7