Has the bathroom, and everything in it, and whatever else in the house, become impure due to the woman's hands or feet touching a piece of underwear that had menstrual blood on it, and which was left on the bathroom floor and washed with water?
Certainty is not dispelled by doubt, and the default state of things is purity. Therefore, the transfer of impurity is not ruled except with certainty. It is advisable to turn away from thinking about such matters to avoid obsessive thoughts.
Summarized from the full answer at Ftawy · reviewed Sep 2, 2026
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