Shu'bi (may Allah have mercy on him) said in the explanation of the verse: "And [forbidden to you are] married women except those your right hands possess" (__QUR_N__): The protection (ihsan) of a slave woman is her entering into Islam and her acknowledgment (of it). So when she enters Islam and acknowledges it, then commits adultery, the punishment of fifty lashes will be carried out on her.
Hadith Referenceسنن سعید بن منصور / كتاب التفسير / 608
Hadith Gradingمحدثین:سنده صحيح.
Hadith Takhrij«أخرجه سعيد بن منصور فى (سننه) برقم: 608، والبيهقي فى(سننه الكبير) برقم: 17190»