A teacher breaking his fast so that he can keep his voice loud

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They work in difficult jobs such as smelting metals
If a pregnant woman feels a bit tired can she break her fast?

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Related Answers:
He did not fast because of sickness for which there is no hope of a cure, then he became able to fast
What should the Muslims who are prevented from fasting by the Chinese government do?
Is there any other way to compensate for missed fasts due to pregnancy and breastfeeding apart from fasting those days at a later time?
They work in difficult jobs such as smelting metals
If a pregnant woman feels a bit tired can she break her fast?

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