Ruling 667. Whenever the time remaining [to perform prayers within their prescribed time] is so little that if one were to perform wuḍūʾ or ghusl he would have to perform the entire prayer or part of it after its time, he must perform tayammum.

Ruling 668. If someone intentionally delays the prayer to the extent that he does not have time to perform wuḍūʾ or ghusl, he commits a sin but his prayers performed with tayammum are valid. However, the recommended precaution is that he should make up that prayer afterwards.

Ruling 669. If a person doubts whether or not he will have time to perform prayers if he performs wuḍūʾ or ghusl, he must perform tayammum.

Ruling 670. If someone performs tayammum due to shortage of time and after the prayer he is able to perform wuḍūʾ but does not, and now he does not have the water he had previously, in such a case, if his duty now is to perform tayammum, he must perform tayammum again for subsequent prayers even if he has not done anything that invalidates tayammum.

Ruling 671. If someone has water but due to shortage of time he starts performing prayers with tayammum, and during prayers the water he had is lost, in the event that his duty now is to perform tayammum, it is not necessary for him to perform tayammum again for subsequent prayers although it is better that he does.

Ruling 672. If a person has just enough time to perform wuḍūʾ or ghusl and to perform prayers without doing the recommended acts, such as iqāmah and qunūt, he must perform ghusl or wuḍūʾ and perform prayers without doing the recommended acts. In fact, if one does not have time to recite even the surah [of the Qur’an, following the recitation of Sūrat al-Ḥamd], he must perform ghusl or wuḍūʾ and perform the prayer without reciting the surah.