The same qualifying pattern appears in Zaydu bnu ʿAmrin and Hindu ibnatu Bakrin; the normal written alif of ibnah is retained.
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Parallel Syntax, Different Spelling
Tanwīn: Five Types, Their Function, and Omission
The same qualifying pattern appears in Zaydu bnu ʿAmrin and Hindu ibnatu Bakrin; the normal written alif of ibnah is retained.