TgJ Is29:2 :וֻתהֵי מַקְפָא קְֹדָמַי דַם קְטִילִין כְאַקָפוּת מַדבְחָא דַם נִכסַת קוּדשַיָא‏ : it will be surrounded before Me by the blood of the slain as the altar is surrounded by the blood of sacred slaughtering
See the entire entry for nqp vb. to circle around, surround