What are the husband’s obligations towards his children and his ex-wife who has custody of them?

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Check below answers in case you are looking for other related questions:
Is the woman who is divorced after consummation of the marriage entitled to maintenance?
He gives his family money to buy luxuries and borrows from his wife

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She has both male and female children; who spend on her?
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Is the woman who is divorced after consummation of the marriage entitled to maintenance?
He gives his family money to buy luxuries and borrows from his wife

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