Sunan Ibn Majah 1916
سنن ابن ماجه#1916HasanIt was narrated from Anas:that the Messenger of Allah said: “Three days for a previously-married woman and seven days for a virgin.”
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniHasan
Muhammad Fouad Abd al-BaqiHasan
Zubair Ali ZaiHasan
In-book reference: 9:72