The ruling on a menstruating woman entering the mosque

Question:
In their third question, they ask: Is it permissible for a woman to enter the mosque while she is menstruating?

Answer:
Yes, she may pass through the mosque to fetch a need, but she must not sit in it. She must not sit in it while menstruating; she only passes through to fetch the need and then leaves. The Messenger (peace and blessings be upon him) said to 'A'ishah, "Hand me such and such from the mosque." She said, "I am menstruating." He said (peace and blessings be upon him), "Your menstruation is not in your hand." So it is permissible for a menstruating woman to enter the mosque to fetch a need and to pass through the mosque for a need; there is no harm in that. Yes.