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
← Previous Hadith the Prophet said about a man who had sexual intercourse with his wife while she is menstruating: "He should give half a Dinar in charity."

Jami` at-Tirmidhi Book 1, Hadith 136 Next Hadith → 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