Then the Shaykh (Al-Mufid), may Allah سبحانه وتعالى support him, said: "If impurity affects any of the vessels, they are purified by washing." This has already been explained previously. The Shaykh (Al-Mufid), may Allah سبحانه وتعالى support him, also said: "If urine falls on the ground and the sun dries it, then it becomes purified by that, and the same applies to mats and woven reeds."
Commentary #28