Muwatta Malik #1789
Dress
Yahya related to me from Malik from Abu Bakr ibn Nafi from his
father Nafi, the mawla of Ibn Umar that Safiyya bint Abi Ubayd
informed him that Umm Salama, the wife of the Prophet, may Allah bless
him and grant him peace, said that when the lower garment of women was
mentioned to the Messenger of Allah, he said, "She lets it down a
handspan." Umm Salama said, "If it leaves her uncovered?" He said,
"Then the length of a forearm and let her not increase it."
About Muwatta Malik
This hadith is #1789 from Muwatta Malik, in the Book of Dress. Muwatta Malik contains 1,985 hadiths across 61 books.