Sajʿ centers on correspondence among the endings of prose clauses. Pattern and internal word-pair correspondence further distinguish its types: muṭarraf has differing end-word patterns, mutawāzī has corresponding patterns, and muraṣṣaʿ extends correspondence through multiple word pairs.
Excellent sajʿ serves meaning without artificial constraint, joining proportion and appropriate diction. Qurʾānic fawāṣil retain their distinct designation even when studied for sonic elegance.
Muwāzanah centers on corresponding patterns without requiring the same final rhyme. The next verbal ornament, qalb, concerns reversal or rearrangement rather than correspondence of clause endings.