Yazid bin Abi Habib يزيد بن أبي حبيب · The Book of Menstruation and Istihadah

"I saw her wash tub filled with blood." The Messenger of Allah (ﷺ) said to her: "Stop (praying) for as long as your period used to last, then perform Ghusl."

"That is a vein, so when your period comes, do not pray, and when your period is over, purify yourself and pray in between one period and the next." Abu 'Abdur-Rahman said: Hisham bin 'Urwah reported this Hadith from 'Urwah, and he did not mention what Al-Mundhir mentioned in it.