This tradition has been transmitted through the chain of narrators like that of al-Laith to the same effect. It says; She should abandon prayer considering that period (she used to menstruate). When the time of prayer approaches, she should take a bath, tie a cloth over her private parts and offer prayer.
Explanation & Benefits
Shaykh Umar Farooq Saeedi
277. Commentary:
It does not become obligatory for a menstruating woman to perform the ritual bath (ghusl) immediately upon becoming pure from menstruation; rather, it becomes obligatory when the time for prayer arrives.
Source: Sunan Abu Dawood – Commentary by Shaykh Umar Farooq Saeedi, Page: 277