ولا يضر في التضمين التغيير اليسير لما قصد تضمينه
A slight alteration in the wording intended for incorporation does not invalidate taḍmīn.
Meter, pronouns or address may require a modest adjustment. If the intended borrowing remains identifiable, that change does not erase the technical relation between the earlier and later verse.
If alteration becomes so extensive that neither the cited words nor their distinctive function can be recognized, a vague similarity is not enough to classify the result as this kind of poetic incorporation.