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Safek neder


Can I rely on a sfek sfeika for
Example, if someone decided to fast on the upcoming בהב
But he’s not sure if he decided it to be permanent
And he’s not sure if he had in mind every Monday and Thursday can he eat on a regular Monday and Thursday?
Thank you.



In order to have to fast it has to be said from one’s mouth, and thinking is not enough. Like all nedarim ldevar mitzva.

Best wishes


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