(a) It is narrated from Sayyidah Aishah (may Allah be pleased with her) that Sayyidah Asma bint Abi Bakr (may Allah be pleased with them both) came to the Messenger of Allah (peace and blessings be upon him) wearing thin Syrian clothes. The Messenger of Allah (peace and blessings be upon him) turned his face away and said: "O Asma! When a woman reaches the age of puberty, it is not proper that any of her body be seen except this and this." And he (peace and blessings be upon him) pointed to his face and his two palms.
(b) Imam Abu Dawud (may Allah have mercy on him) said: This hadith is mursal; Khalid bin Durayk's meeting with Sayyidah Aishah (may Allah be pleased with her) is not established.
(c) Imam al-Bayhaqi (may Allah have mercy on him) said: This hadith is mursal, but together with the statements of the Companions (may Allah be pleased with them) that have already passed, that Allah has permitted the outward adornment, this view becomes strong with these supporting reports. 'Wa billahi al-tawfiq' (And success is only through Allah).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 3218