Answered by Shaykh Amjad Rasheed
If one strand of a woman’s hair shows while she is praying, does that invalidate the prayer? Does it change anything if she immediately covered the hair after it was exposed?
Yes, it does invalidate a woman’s prayer if any of the hair from her head shows, even if only a little. There is no benefit in covering it immediately after it has been exposed if it was showing from the beginning.
(Translated by Shazia Ahmad)
الجواب : نعم تبطل صلاةُ المرأة بظهور شيء من شعر رأسها وإن قلّ كشعرة ، ولا يفيد سترها فوراً بعد ظهورها إن لم تكن قد سترها ابتداء .