The woman having bleeding after delivery (puerperal haemorrhage) would refrain (from prayer) for forty days or forty nights; and we would anoint our faces with an aromatic herb called wars to remove dark spots.
Sunan Abi Dawud Book 1, Hadith 311
← Previous Hadith 'Ikrimah reported Hamnah daughter of Jahsh as saying that her husband would have intercourse with her during the period she had a flow of blood.

Sunan Abi Dawud Book 1, Hadith 310 Next Hadith → I performed Hajj and came to Umm Salamah and said (to her): Mother of the believers, Samurah b. Jundub commands women to complete the prayers abandoned during their menstrual period. She said: They should not do so. The wives of the Prophet (ﷺ) would refrain (from prayer) for forty nights (i.e. days) during the course of bleeding after child birth. The Prophet (ﷺ) would not command them to complete the prayers abandoned during the period of bleeding.

Muhammad b. Hatim said: The name of Al-Azdiyyah is Mussah and her patronymic name is Umm Busrah.

Abu Dawud said: The patronymic names of Kathir b. Ziyad s Abu Sahl.

Sunan Abi Dawud Book 1, Hadith 312