BT San 39a(29) :מ{{ל}}^פ^לגך לתתאי דאהו רמיז אמ׳ ליה היכי שביק ליה אהו רמיז‏ : from the your waist upward is (under the control) of Ormizd; from your waist downward (is under the control) of Ahriman
See the entire entry for ple/aḡ, pe/algā n.m. half; waist