Seal on my heart

“Set me as a seal upon your heart,” says the Bride to the Bridegroom.

Now the priest wore stones with the names of the tribes “engraven like a seal” on his breastplate (Exodus 28:11, 21) and the name of Yahweh, also “engraven like a seal” on the golden plate on his head (Exodus 28:36).

The stones were attached to the breastplate so that the names of the sons of Israel would be “upon his heart” as he entered the Holy Place (Exodus 28:29).

Thus: “Set me as a seal upon your heart” = “Be a priest for me, with my name sealed on your heart as you enter Yahweh’s presence.”