He broke oaths and does not remember how many they were; what should he do?

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He swore oaths adjuring his children not to do certain things and the oaths were broken, but he has not offered expiation
He owes many expiations for breaking oaths (kafaarat yameen) but he does not know what some of them are

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He vowed to build a mosque but now he wants to sell the land
He swore oaths adjuring his children not to do certain things and the oaths were broken, but he has not offered expiation
He owes many expiations for breaking oaths (kafaarat yameen) but he does not know what some of them are

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