It is narrated from Muhammad bin Ibrahim bin Harith Al-Taimi (may Allah have mercy on him) that Nafi’, who had corresponded with Umm al-Mu’minin Sayyida Umm Salamah (may Allah be pleased with her), asked Zaid bin Thabit (may Allah be pleased with him) about an issue: “I have given two divorces to my free wife.” So Zaid bin Thabit (may Allah be pleased with him) said: “She has become unlawful for you.”
Hadith Referenceمسند الإمام الشافعي / كتاب الطلاق / 1258
Hadith Takhrijاسناده ضعيف لإنقطاعه فان محمد بن ابراهيم التيمى لم يسمع من زيد بن ثابت اخرجه البيهقي : 7/ 369۔ وفي المعرفة السنن والآثار له (4482) - ومالك فى الموطأ ،الطلاق، باب ما جاء في طلاق العبد۔