Good Manners and Form (Al-Adab)

Bukhari :: Book 8 :: Volume 73 :: Hadith 68

Narrated 'Abdullah bin Zam'a:

The Prophet forbade laughing at a person who passes wind, and said, "How does anyone of you beat his wife as he beats the stallion camel and then he may embrace (sleep with) her?" And Hisham said, "As he beats his slave"