The book distinguishes qalqalah letters: when sākin, their recognized articulation involves a release or movement. This is not license to add an ordinary short vowel.
For practice, stop on «أَحَدْ». The final dāl has qalqalah but must not acquire a new fatḥah, kasrah or ḍammah.
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Qalqalah release is not a new vowel
Correct Vowel Articulation — Fatḥah, Kasrah, Ḍammah, Ishbāʿ and Sukūn
The book distinguishes qalqalah letters: when sākin, their recognized articulation involves a release or movement. This is not license to add an ordinary short vowel.
For practice, stop on «أَحَدْ». The final dāl has qalqalah but must not acquire a new fatḥah, kasrah or ḍammah.