Hadith 10:1067
Abu Bakr narrated to us, he said: Jarir ibn Abd al-Hamid narrated to us, from Mughira, from Ibrahim, regarding a woman whose husband died while she was a slave, then she was emancipated. He said: She proceeds according to the waiting period of a slave woman, and she has nothing but the waiting period of a slave woman.
حدثنا أبو بكر قال نا جرير بن عبد الحميد عن مغيرة عن إبراهيم في امرأة مات عنها زوجها ثم أعتقت قال تمضي على عدة الأمة وليس لها إلا عدة الأمة