Narrated Sahl bin Sa`d
I witnessed a husband and a wife who were involved in a case of Lian. Then (the judgment of) divorce was passed. I was fifteen years of age, at that time.
Narrated Sahl
(the brother of Bani Sa`ida) A man from the Ansar came to the Prophet (ﷺ) and said, "If a man finds another man sleeping with his wife, should he kill him?" That man and his wife then did Lian in the mosque while I was present.