Part 13 · Chapter 154

And the reason for the matter is that the seven lower [Sefirot] of Atik Yomin, although they become clothed within the body of Arich Anpin, nevertheless their principal [clothing] is only within the head of Arich Anpin, as above. And the last Malchut of Atik was clothed in the nose of Arich Anpin, as above.