Ruling 705 — Purification (Ṭahārah)

If someone who cannot perform wuḍūʾ or ghusl loses hope in his legitimate excuse expiring, he can perform his qaḍāʾ prayers with tayammum. However, if afterwards his legitimate excuse expires, the obligatory precaution is that he must perform his qaḍāʾ prayers again with wuḍūʾ or ghusl. If he does not lose hope in his legitimate excuse expiring, then based on obligatory precaution, he cannot perform tayammum for qaḍāʾ prayers.