The World Federation One Stop Fiqh

Ruling 739

Whenever someone has a legitimate excuse (ʿudhr) that obliges him to perform his prayer with dry ablution (tayammum), if he wants to perform his prayer at the start of its prescribed time, then in the event that he is not hopeful of his excuse expiring, or he deems it probable that even if he delays performing tayammum he will still be unable [to perform his prayer with ablution (wuḍūʾ)], in such a case, he can perform tayammum at the start of its prescribed time and perform his prayer. However, if he is hopeful [of his excuse expiring], he must wait until his excuse expires or he loses hope; and in the event that his excuse does not expire, he must perform his prayer at the end of its prescribed time. Furthermore, it is not necessary that he wait until he has time to perform only the obligatory acts of the prayer; rather, if he has time, he can perform tayammum and perform his prayer with the recommended acts, such as adhān, the call to stand for prayer (iqāmah), and qunūt. In the case of excuses other than those for which one can perform tayammum, even if one is hopeful of the excuse expiring, it is permitted to perform prayers at the start of their prescribed time; however, in the event that the excuse expires within the prescribed time, it is necessary to repeat the prayer in some cases.