والثاني: قد تترك الحقيقة بدلالة في نفس الكلام
Second, the literal meaning can be set aside because of an indication contained in the speech itself.
In this case the clue comes from the expression's own wording, not external convention. A general expression may be accompanied by a qualifying phrase that cannot properly apply to every potential member of the general category.
For example, 'all those whom I own' sounds comprehensive; yet a qualifying legal description in the same statement may restrict those to whom the ruling can attach.
Custom is external established usage; intrinsic indication arises from the words spoken together. A qualifying word must actually be present or clearly entailed, not supplied from speculation.