What is the supporting evidence for the main ruling that this statement constitutes defamation?

Primary text

The evidence for the main ruling is that the inherent meaning and intended subject matter (*mawdu'*) of the verbal formulation inherently necessitates the implication of shared action and preference, and thus the statement must be interpreted according to that implication, similar to when one simply states, 'You are an adulterer' (*anta zani*).