Ibn Abbas (may Allah be pleased with him) says concerning this verse: "And let them not display their adornment except what appears of it" [Surah An-Nur: 31] that it refers to kohl and the ring.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب النكاح / 13494
Umm Shabib (may Allah be pleased with her) says: I asked Sayyidah Aishah (may Allah be pleased with her): "What is meant by the 'apparent adornment' [Surah An-Nur: 31]?" She said: "The bracelet and the ring," and she moved both her sleeves.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب النكاح / 13495
It is narrated from Sayyidah Aishah (may Allah be pleased with her) that Sayyidah Asma bint Abi Bakr (may Allah be pleased with her) came in while the Prophet (peace and blessings be upon him) was with Sayyidah Aishah (may Allah be pleased with her), and she was wearing thin Syrian clothes. He (peace and blessings be upon him) lowered his gaze to the ground and said: "O Asma! What is this? When a woman reaches maturity, it is not proper that anything of her be seen except such and such." And he (peace and blessings be upon him) pointed to his face and the palms of his hands.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب النكاح / 13496
The Prophet (peace and blessings be upon him) came to Aishah bint Abi Bakr (may Allah be pleased with her), and with her was her sister Asma bint Abi Bakr (may Allah be pleased with her). She was wearing Syrian clothes with very wide sleeves. When he (peace and blessings be upon him) looked at her, he stood up and went out. Then Aishah (may Allah be pleased with her) said to Asma (may Allah be pleased with her): "Move aside; the Messenger of Allah (peace and blessings be upon him) has seen something that he disliked." So she moved aside. Then he (peace and blessings be upon him) came in, and Aishah (may Allah be pleased with her) asked: "Why did you leave?" He (peace and blessings be upon him) said: "Did you not see her state? It is not fitting for a Muslim woman that any part of her be visible except this." He (peace and blessings be upon him) took hold of his palm and covered its back until nothing of the hand showed except the fingers; then he placed his palms on his temples until only his face showed.
Its chain is weak.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب النكاح / 13497
Sayyidah Aishah (may Allah be pleased with her) says that Hind bint Utbah said: "O Prophet of Allah! Accept my pledge of allegiance." He (peace and blessings be upon him) said: "I will not accept your pledge until you change (the colour of) your palms; these are like the paws of a beast of prey."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب النكاح / 13498
Sayyidah Aishah (may Allah be pleased with her) says that a woman came to the Prophet (peace and blessings be upon him) from behind a curtain with a letter. The Prophet (peace and blessings be upon him) withdrew his hand and said: "I do not know whether this is a woman's hand or a man's." She said: "No, rather it is a woman's hand." He (peace and blessings be upon him) said: "If you are a woman, then keep your nails coloured with henna."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب النكاح / 13499