Hilchos Lashon Hara, Opening – Negative commands (3)

The speaker also breaks the verse (Devarim 24:8), "Beware of the plague of tzara'as to guard exceedingly and to do." The Sifra explains that "guard exceedingly" means: do not forget to be careful about lashon hara, so that tzara'as (a skin disease sent as a punishment) does not come upon you because of these words.