LEV10 The Prohibition against Divulging Another Person's Secret. An element of loyalty is the ability to guard a friend's secret. A person who divulges others' secret is considered a slanderer, as the verse says, "… Slanders, reveals secrets…" (Mishlei [Proverbs-AJL] 11:13). Included in this prohibition is the disclosure of any piece of information communicated by another person without receiving explicit permission from that person to share the information with others. The Talmud (Yoma 4b) says, "From where do we learn that it is prohibited to disclose another person's statement unless that person has given permission? From the verse, 'and Hashem spoke to him from the ohel moed to say (leimor)'" [this verse]. Rashi explains that the Gemara discerns a secondary, non-literal understanding of the word "leimore" -- "lo emor," literally, "do not say." This law is discussed at length in Sefer Chafetz Chaim (klal 2:7:18 and Hilchos Rechilus klal 8:5).