Reference: al-Muntaqaa min Fataawa Shaykh Saalih al-Fowzaan – Volume 3, Page 58, Fatwa No.87
Question: Is it permissible for women to go to the masaajid and the [Islaamic] study lessons (circles)?
Response: Yes. It is permissible for women to go to the masaajid and the [Islaamic] study lessons (circles), however so long as they are covered and are (seated) behind the men as the Prophet ﷺ said:
«Keep them towards the back as Allaah has kept them towards the back», [Musannaf ‘Abdur-Razzaaq as-San’aanee (3/149)]
…and he said:
«The best of the rows for the men are the front rows and the worst of them are the last ones, and the best of the rows for the women are the last ones and the worst of them are the first ones», [Saheeh Muslim (1/326)]