فِيهَا سُرُرٌ مَرْفُوعَةٌ وَأَكْوَابٌ مَوْضُوعَةٌ
In it are raised couches and arranged cups.
The terminal words marfūʿah and mawḍūʿah share a patterned ending and a compatible form. The Qur’anic term fawāṣil should be respected while comparing their sounds with the technical study of sajʿ.
A constructed replacement may preserve comparable metre but break the final-letter correspondence. That illustrates why verbal balancing and sajʿ need separate tests for weight and terminal sound.