Sayyiduna Abu Hurayrah and Sayyiduna Zayd bin Khalid (may Allah be pleased with them both) were present when the Messenger of Allah (peace and blessings be upon him) was asked about a slave woman who commits adultery, and he (peace and blessings be upon him) said: "Flog her three times, then sell her, even if for a rope."
Hadith Referenceالمعجم الكبير للطبراني / باب الزاي / 5185