"Your neck is an ivory tower" (Song of Songs 7:3) - this is Jerusalem, as it is written (4:4) "Like a tower of David is your neck..." - her adornments are the priests, Levites and Israelites; "... built as an armory (talpiot)" - this is the Righteous One who is a hill (tel) towards which everyone faces (ponim), and whose points are the true prophets. For the Shechina is surely Jerusalem, adorned by the three forefathers, bejewelled with the foundations of truth.
Another reading: "Your neck" - this is the Torah, adorned by her 248 commandments; her jewels and amulets are the 365 prohibitions guarding her. When she rises up, wearing these jewels, towards Her groom, how many good scents rise up in Her! Of this it is written (Song of Songs 3:6) "Who is she rising from the desert" - this is Mount Sinai, the neck of the world; "in clouds of myrrh" - this is the Holy One, of whom it is said (4:6) "I will go to the mount of myrrh"; "and frankincense" - this is the holy moon, of whom it said "and to the hills of frankincense"; "from all the powders of merchants" - this is the Righteous, who is everything united in All.