Is a divorce binding if it was pronounced as part of a deferred pledge to do something?

Fatwa, posted 4.22.2010, from Egypt, in:
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Fatwa Question or Essay Title: 
Is a divorce binding if it was pronounced as part of a deferred pledge to do something?

Such a pledge of divorce is not valid, and the husband should feed ten poor people as repentance for using divorce as a pledge to swear on.

[This response was provided by Sheikh Saad Fadhil of the Ikhwan.]

(إن فعلت فعلاً معينًا فهي طالق)؛ حتى إنه نسى نص القسم ومضمونه، وبعد فترة طويلة أخبرته أنها فعلت ما أقسم عليه ولا تدري ماذا كانت نيته وقت القسم.. فما الحكم؟

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