Abu Dawud Book 1, Hadith Number 311.

Chapter : A person who is sexually defiled is permitted to eat anything before washing.

Narated By Umm Salamah, Ummul Mu’minin : 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.