Muhammad reported,

He asked Qasim bin Muhammad about the woman experiencing prolonged bleeding, and he said, "She refrains from prayer during the days of her menstrual period, then she performs the ritual bath and prays, then she performs the ritual bath during the remaining days."

Abu Dawud 303

Sahih

حدثنا القعنبي حدثنا عبد العزيز يعني ابن محمد

عن محمد بن عثمان

أنه سأل القاسم بن محمد عن المستحاضة فقال تدع الصلاة أيام أقرائها ثم تغتسل فتصلي ثم تغتسل في الأيام

أبو داود 303صحيح
Contents
Reference
Commentary
Ayat
Collection
Sunan Abu Dawud
Book
Purification
Chapter
Whoever said she should bathe between the days
Numbering
Darussalam 303
Abu Dawud 303