BT Ḥul 57b(19) :אי הוה ר׳ יוח׳ באתרא דמורו בה להיתיר׳ לא הוה פרכיס‏ : had PN been in the place where they make a permissive ruling he would not have objected
See the entire entry for prks vb. to tremble; to object