Ruling 342:
If someone does not know whether his duty is to perform tayammum or jabīrah wuḍūʾ, he must perform both of them.
-Ayatullah Sistani, Practical Laws of Islam, Purification (Taharah)
Purity: Uncertainty Between Jabirah Wudu and Tayammum
Practical Laws of Islam as per the teachings of Ayatullah Sistani
