ʿAqd turns prose into verse; ḥall transforms a poem into prose; and talmīḥ alludes to a known story, poem or proverb sufficiently to recall it without narrating it fully.
ما لابن آدم والفخر، وإنما أوله نطفة وآخره جيفة
Why should a child of Adam boast when his beginning is a drop and his end a corpse?
Putting this prose thought into poetic form raises the question of ʿaqd. Recasting the sense of an existing poem in independent prose is ḥall. Briefly invoking a familiar narrative through a name or emblem is talmīḥ; not every allusion amounts to a complete quotation or converted verse.