The World Federation One Stop Fiqh

Ruling 714

If someone’s duty is to perform tayammum and he performs it for some act, then as long as his tayammum and the legitimate excuse remain valid, he can perform those acts that must be performed with wuḍūʾ or ghusl. However, if his legitimate excuse was a shortage of time, or, despite having water he performed tayammum for ṣalāt al‐mayyit or sleeping, then with that tayammum he can perform only those acts for which he performed tayammum.