The Prophet (ﷺ) said: Allah does not accept the prayer of a woman who has reached puberty unless she wears a veil.

Abu Dawud said: This tradition has been narrated by Sa;id b. Abi 'Arubah from Qatadah on the authority of al-Hasan from the Prophet (ﷺ).
Sunan Abi Dawud Book 2, Hadith 251
← Previous Hadith if the shirt is ample and covers the surface of her feet.

Abu Dawud said: This tradition has been transmitted by Malik b. Anas, Bakr b. Mudar, Hafs b. Ghiyaht, Isma'il b. Ja'far, Ibn Abu Dhi'b, and Ibn Ishaq from Muhammad b. Zaid on the authority of his mother who narrated from Umm Salamah. None of these narrators mention the name of the Prophet (ﷺ). They reported it directly from Umm Salamah.

Sunan Abi Dawud Book 2, Hadith 250 Next Hadith → ‘A’ishah came to Safiyyah Umm Talha al-Talhat and seeing her daughter she said: The Messenger of Allah (ﷺ) entered (into the house) and there was a girl in my apartment. He gave his lower garment (wrapper) to me and said; tear it into two pieces and give one-half to this (girl) and the other half to the girl with Umm Salamah. I think she has reached puberty, or (he said) I think they have reached puberty.

Abu Dawud said: Hisham has narrated it similarly from Muhammad b. Sirin.

Sunan Abi Dawud Book 2, Hadith 252