Taʿrīḍ is indirect allusion: discourse may state a general principle or admonition yet also point toward a particular individual or historical situation without explicitly naming that individual.
Two levels must be kept distinct: the general terms of the statement and the specific circumstances toward which it alludes. Knowing the occasion can reveal the force and relevance of an address, but it does not automatically limit a generally framed rule to that one person.
The reader therefore consults narrative setting, addressee, purpose and well-grounded contextual information. Inventing an unnamed target through speculation is not a valid explanation of allusion.