Qāfiyah denotes the prescribed rhyme relation at the end of poetic lines. One central element is the rawī, the repeated principal consonant around which the rhyme is organized.
In regulated verse, the rules of rhyme mark the identity of a poetic composition. Qur’anic verses can likewise have related endings, yet they are not restricted to one repeated consonant or to the fixed form of a single poetic genre.
Interpretive benefit: read the final word for its meaning, its suitability as a pause, and its sound. Identifying a similar syllable alone cannot explain the rhetorical function of a verse ending.