Dry impurity does not pass to the one who touches it, so his garments do not become impure and neither does his body. If a person sits on dried urine, his clothes do not become impure as a result of that, and he does not have to wash them.

There is a great amount of evidence that the urine and dung of animals whose flesh may be eaten is pure. Therefore, it does not have to be washed off if it gets onto one’s clothes or body, or on the carpet, and there is nothing wrong with praying in these clothes or on this carpet.