Offering Prayers with Tayammum at the Beginning of the Prayer Time
Issue No.659- If a person whose obligation is tayammum is sure or considers it probable that his excuse will continue until the end of the time prescribed for prayer, he can perform prayer with tayammum at the beginning of its time, but if he is sure that his excuse will cease to exist by the end of the time, he should wait, as an obligatory precaution.
