'A'isha, the wife of the Apostle (ﷺ) , said: Umm Habiba bin Jahsh who was the spouse of Abdul Rahman bin Auf made a complaint to the Messenger of Allah (ﷺ) about blood (which flows beyond the menstrual period). He said to her: Remain away (from prayer) equal (to the length of time) that your menstruation holds you back. After this, bathe yourself. And she washed herself before every prayer.
This hadith has been reported on the authority of Sulaiman bin Bilal (RA) with the same chain of transmitters and he is reported to have said: "The best condiment." And he did not doubt (about this word).