It was narrated that Anas said:"The Messenger of Allah set the time for postnatal bleeding at forty days, except for one who becomes pure before that
Hadith No. 649
Sunan Ibn Majah
Gradings:
Al-Albani:
Very Daif
Muhammad Fouad Abd al-Baqi:
Very Daif
Shuaib Al Arnaut:
Daif
Zubair Ali Zai:
Daif