Lady Asma bint Abu Bakr (may Allah be pleased with them both) narrates: A woman asked the Prophet Muhammad (peace be upon him) about menstrual blood (i.e., that which gets on clothes), so the Prophet (peace be upon him) said: "Scrape it off, then rub it with water, then sprinkle water over it, then pray in that (garment)." (Imam Ibn Hibban, may Allah have mercy on him, says:) The command to scrape and sprinkle water is for recommendation, not obligation, and the command to rub it with water is connected to its condition, which is the removal of the impurity. So, the removal of the impurity is obligatory, and rubbing it with water is supererogatory, if it is possible to remove the impurity without rubbing. And after washing the garment, the command to pray in that garment is for permissibility, not for obligation.