What if you touch menstrual blood without washing your hands a night before and the next day you touch a person’s prayer cloth without inspecting your hand to check if the blood was still there. There’s no trace of blood on that cloth but you’re still scared and the prayer cloth is not yours, even if there’s no blood stain or trace does it mean the person’s prayers won’t be answered?

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If there’s no trace of blood and your hand is dry, then any surfaces or objects you touch will not become najis