What is the ruling on clothing touching an impure spot without the impurity transferring during prayer?

If a worshipper's garment touches dry impurity during prayer, their prayer is valid and they are not required to repeat it, especially if the impurity is in a place that does not come into contact with any part of the worshipper's body. However, if the dry impurity is in the place of their prayer and they intentionally pray on it, their prayer is invalid. But if they were forgetful or ignorant, their prayer is valid.