It is narrated from Sayyidah Umm Salamah (may Allah be pleased with her) that she asked the Prophet (peace and blessings be upon him): May a woman pray in a shift and a head-covering while she is not wearing a lower wrap (underneath)? He (peace and blessings be upon him) said: "Yes, provided that the shift is long enough to cover the tops of her feet." This hadith is sahih (authentic) on the condition of Imam Bukhari, but they did not record it.

Zayd bin Aslam narrates: I saw Sayyiduna Ibn Umar (may Allah be pleased with them both) praying in a state where the fastening of his lower wrap was undone. I asked him about this and he said: I saw the Messenger of Allah (peace and blessings be upon him) doing the same. This hadith is sahih (authentic) on the condition of the two Shaykhs (Bukhari and Muslim), but they did not record it.