The standard feminine dual is ramatā. The text rejects or labels as weak ramātā, which restores an alif before the feminine marker; distinguish that extra alif from the normal dual suffix after tāʾ.
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Ramatā versus Ramātā
Feminine Tāʾ in the Past Tense: Form and Agreement
The standard feminine dual is ramatā. The text rejects or labels as weak ramātā, which restores an alif before the feminine marker; distinguish that extra alif from the normal dual suffix after tāʾ.