(In Surah Al-A'raf) Allah, the Mighty and Majestic, commands «خذوا زينتكم عند كل مسجد‏» that you should wear your garments at every time of prayer. And whoever performs prayer wrapped in a single garment (he has also fulfilled the obligation). And it is narrated from Salamah bin Akwa' that the Prophet (peace and blessings of Allah be upon him) said: (If one prays in a single garment) he should fasten his garment, even if he has to fasten it with a thorn. There is some discussion regarding its chain of narration. And the person who prays in the same garment in which he had intercourse (his prayer is valid) as long as he does not see any impurity on it. And the Prophet (peace and blessings of Allah be upon him) had commanded that no naked person should perform Tawaf of the Ka'bah.

Narrated Um `Atiya: We were ordered to bring out our menstruating women and veiled women in the religious gatherings and invocation of Muslims on the two `Id festivals. These menstruating women were to keep away from their Musalla. A woman asked, "O Allah's Apostle ' What about one who does not have a veil?" He said, "Let her share the veil of her companion."