Volume 1, Book 4, Number 228:
Narrated ‘Aisha:
Fatima bint Abi Hubaish came to the Prophet and said, “O Allah’s Apostle I get persistent bleeding
from the uterus and do not become clean. Shall I give up my prayers?” Allah’s Apostle replied, “No,
because it is from a blood vessel and not the menses. So when your real menses begins give up your
prayers and when it has finished wash off the blood (take a bath) and offer your prayers.” Hisham
(the sub narrator) narrated that his father had also said, (the Prophet told her): “Perform ablution for
every prayer till the time of the next period comes.”