Purity: Ruling on Clothes Contaminated by a Disbeliever Before Conversion to Islam

Practical Laws of Islam as per the teachings of Ayatullah Sistani

Ruling 206

If when someone was a disbeliever any clothes of his that were wet made contact with his body – irrespective of whether those clothes were on his body at the time he became a Muslim or not – then based on obligatory precaution, one must avoid them [i.e. they are ruled to be impure].

-Ayatullah Sistani, Practical Laws of Islam, Purification (Taharah)