Hadith 10:1142
Abu Bakr narrated to us, he said: Waki’ narrated to us, from Usama bin Zayd, from Nafi’, that a woman’s husband died, so she observed her waiting period (iddah) in her house for one day, and Ibn Umar ordered her to make it up.
حدثنا أبو بكر قال نا وكيع عن أسامة بن زيد عن نافع أن امرأة توفي زوجها فاعتدت في بيتها يوما فامرها بن عمر أن تقضيه