فالبلاغة صفة راجعة إلى اللفظ
Thus balagha is a quality referred to expression or wording.
Here lafz does not mean a mere noise considered apart from signification. Balagha belongs to the utterance because its wording presents meaning through a particular ordering, reinforcement, omission or qualification.
A good thought may be expressed badly. Conversely, evaluating the balagha of an utterance requires considering what its words convey; the sound cannot be assessed in isolation from meaning.