Sayyiduna Ali (may Allah be pleased with him) said that a slave girl of the Prophet (peace and blessings be upon him) gave birth as a result of adultery and was in postnatal bleeding, and he (peace and blessings be upon him) sent me to apply the prescribed punishment to her. I found her in the state of postnatal bleeding, so I came and told the Prophet (peace and blessings be upon him), and he (peace and blessings be upon him) said: "When she is free of the postnatal bleeding, then apply the punishment." And he said: "Establish the prescribed punishments upon your slaves as well."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحدود / 17005