a woman asked the Prophet about a garment that was touched by some menstrual blood. So Allah's Messenger said: "Remove it, and scrub it, then rinse it and pray in it"
Jami` at-Tirmidhi Book 1, Hadith 138
← Previous Hadith the Prophet said: "When the blood is red then (give) a Dinar. And when the blood is yellow then half Dinar."

Jami` at-Tirmidhi Book 1, Hadith 137 Next Hadith → "The time of waiting for Nifas during the time of AIlah's Messenger was forty days. We used to cover our faces with reddish-brown Wars."

Jami` at-Tirmidhi Book 1, Hadith 139