Purity: Touching a Corpse Before It Becomes Cold

Practical Laws of Islam as per the teachings of Ayatullah Sistani

Ruling 511:

Performing this ghusl is not obligatory for touching a deceased person whose entire body has not yet become cold, even if one touches a part that has become cold.

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