Song of Songs 5:2 (as Albert Cook points out in The Root of the Thing) says, “the voice of dodi knocking,” implying that the voice itself has become personified and seeks entry to the bride’s chamber.

Then we allegorize, in light of Revelation 3:20, where it is Jesus who knocks at the door of the church at Laodicea.  That too is the voice of the beloved knocking, for Jesus is the incarnate voice of Yahweh, the incarnation of the voice that spoke creation, that shakes the cedars, that resounds like the thunder and the waterfall.