The Hadith (Inspired Sayings) of Muhammed
Adultery and Prostitution
Men not killed for adultery -- Sahih Buhari-- Volume 3, Book 48, Number 817:
Narrated Zaid bin Khalid: Allah's Apostle ordered that an unmarried man who committed illegal sexual intercourse be scourged one hundred lashes and sent into exile for one year.
Narrated Abu Huraira: Allah's Apostle said, "A prostitute was forgiven by Allah, because, passing by a panting dog near a well and seeing that the dog was about to die of thirst, she took off her shoe, and tying it with her head-cover she drew out some water for it. So, Allah forgave her because of that."