LessonsTafkhīm and Tarqīq — Alif, Divine-Name Lām and RāʾQuiz

If a consonant other than sākin yāʾ intervenes before the rāʾ made sākin by waqf, the book looks back to the earlier vowel. Fatḥah or ḍammah generally gives heaviness, and kasrah gives lightness under the stated rule.
In حِجْرٌ, the jīm is sākin before the rāʾ at a stop. One must look back to the kasrah on ḥāʾ rather than judging from jīm alone.

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Waqf: another sākin consonant before final rāʾ

Tafkhīm and Tarqīq — Alif, Divine-Name Lām and Rāʾ

If a consonant other than sākin yāʾ intervenes before the rāʾ made sākin by waqf, the book looks back to the earlier vowel. Fatḥah or ḍammah generally gives heaviness, and kasrah gives lightness under the stated rule.
In حِجْرٌ, the jīm is sākin before the rāʾ at a stop. One must look back to the kasrah on ḥāʾ rather than judging from jīm alone.