(9) باب وُجُوبِ الإِحْدَادِ فِي عِدَّةِ الْوَفَاةِ وَتَحْرِيمِهِ فِي غَيْرِ ذَلِكَ إِلاَّ ثَلاَثَةَ أَيَّامٍ
A hadith like this is transmitted on the authority of Nafi'.
Reference: Sahih Muslim 1490 b
In-book reference: Book 18, Hadith 81
USC-MSA web (English) reference(deprecated numbering scheme): Book 9, Hadith 3546