The article lām in «الْفِيلِ» is pronounced because fāʾ is a moon letter. Before the final lām is a madd yāʾ. Pausing changes the final lām to sukūn, yielding madd ʿāriḍ li-s-sukūn.
Similarly, in «تَضْلِيلٍ», the final lām becomes sākin when pausing after a madd yāʾ; the pronounced nūn of kasrah-tanwīn is not retained at the pause. Contrast the normal connected vowel with the pausal lengthening.
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Pauses at al-fīl and taḍlīl
Al-Fīl and Quraysh: Applied Iẓhār, Ikhfāʾ, Idghām, Madd and Waqf
The article lām in «الْفِيلِ» is pronounced because fāʾ is a moon letter. Before the final lām is a madd yāʾ. Pausing changes the final lām to sukūn, yielding madd ʿāriḍ li-s-sukūn.
Similarly, in «تَضْلِيلٍ», the final lām becomes sākin when pausing after a madd yāʾ; the pronounced nūn of kasrah-tanwīn is not retained at the pause. Contrast the normal connected vowel with the pausal lengthening.