and her neck, as ʿĀʾishah’s report makes clear, and she must cover the remainder of her body—including the tops of her feet—as Umm Salamah’s report indicates. It is, however, permissible for her to leave her face uncovered so long as no non-maḥram man can see her, for the scholars are unanimously agreed on this point.

Shaykh al-Islam Ibn Taymiyyah says in Majmūʿ al-Fatāwā (22|113–114): “If a woman prays alone, she is still commanded to wear a khimār, whereas outside the prayer she may uncover her head within her home. Adorning oneself properly in prayer is a right owed to Allah: no one is allowed to circumambulate the Kaʿbah naked, even if he were alone at night, nor to pray naked, even if by himself.” He then adds, “The parts that must be covered during prayer are not tied to the parts that must be covered from others’ sight—neither directly nor inversely.” End quote.

Al-Mughnī (2|328) states: “The rest of a free woman’s body must be covered in prayer; should any of it be exposed, her prayer is invalid—unless the exposure is insignificant. This is also the view of Mālik, al-Awzāʿī, and al-Shāfiʿī.”

[That the woman should draw herself in during bowing and prostration instead of spreading her limbs]
3 – Al-Mughnī (2|258) mentions that a woman should keep her limbs close to her body in bowing and prostration rather than spreading them out. When sitting, she may sit cross-legged, or she may let her legs fall to the side and place them to her right instead of using the tawarruk or iftirāsh postures, because this is more concealing for her.

Al-Nawawī states in al-Majmūʿ (3|455): “Al-Shāfiʿī said in al-Mukhtaṣar: There is no difference between men and women regarding the actions of the prayer.”