DeviceKey conditionUnit analyzed
QalbSame letter order under reversalA selected utterance
TashrīʿTwo valid verse endingsOne verse with two rhyme stops
Luzūm mā lā yalzamAdditional pre-rhyme restrictionA series of rhymes or prose endings
Each device is judged by its own defining condition: letter reversal, dual metrically and semantically valid endings, or extra sound commitment.