قال الشيخ أيده الله تعالى:( فان تيقن انه قد احدث وتيقن أنه قد تطهر ولم يعلم أيهما سبق صاحبه وجب عليه الوضوء ليزول الشك عنه ويدخل في صلاته على يقين من الطهارة). يدل على ذلك انه مأخوذ على الانسان ان لا يدخل في الصلاة الا بطهارة، فينبغي أن يكون مستقينا بحصول الطهارة له ليسوغ له الدخول بها في الصلاة، ومن لا يعلم ان طهارته سابقة للحدث فليس على يقين من طهارته ووجب عليه استينافها حسب ما بيناه. قال أيده الله تعالى:( ومن كان على يقين من الطهارة وشك في انتقاضها فليعمل على يقينه ولا يلتفت إلى الشك وليس عليه طهارة الا أن تيقن الحدث). يدل على ذلك:
The Shaykh (Al-Mufid), may Allah سبحانه وتعالى support him, said: "If he is certain that he has invalidated his ablution and also certain that he performed purification but does not know which of them preceded the other, then it is obligatory for him to perform ablution to remove doubt and to enter the prayer with certainty of purity." This is supported by the principle that a person is obligated not to enter prayer except in a state of purity. Therefore, he should be certain of his purity to allow him to begin the prayer in that state. If someone does not know whether his purity preceded the state of invalidation, then he is not certain of his purity and is obligated to renew it, as we have explained. The Shaykh (Al-Mufid), may Allah سبحانه وتعالى support him, also said: "Whoever is certain of their purity and doubts whether it has been invalidated should act according to their certainty and disregard the doubt. There is no obligation for ablution unless the invalidation is certain." This is supported by (following hadith):
