It is narrated from Sayyidah Asma' (may Allah be pleased with her) that a woman asked the Messenger of Allah (peace and blessings be upon him) about menstrual blood that gets on clothing, and he (peace and blessings be upon him) said: "Scrape it, then rub it with water, then sprinkle it, and pray in it."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الطهارة / 1157
Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) says: The prayers were fifty, the ritual bath (ghusl) for janabah was seven times, and washing urine from clothes was seven times. The Messenger of Allah (peace and blessings be upon him) kept asking for a reduction until the prayers were fixed at five, the ghusl for janabah at once, and washing urine from clothes also remained at once.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الطهارة / 1158