One of their women came upon the Messenger of Allah (ﷺ). She then reported the rest of the tradition to the same effect; but this version she said the words: "a musk-scented piece of cloth."

Musaddad said: Abu 'Awanah used the word firsah (i.e. a piece of cloth), but Abu Al-Ahwas used the word qasrah (i.e. a small piece of cloth).
Sunan Abi Dawud Book 1, Hadith 315
← Previous Hadith Asma' entered upon the Messenger of Allah (ﷺ) and said: Messenger of Allah, how should one of us take bath when she is purified from her menses ? He said: She should take water mixed with the leaves of lote-tree; then should perform ablution and wash her head and rub it so much so that water reaches the roots of the hair; she should then our water upon her body. Then she should take a piece of cloth (or cotton or wool) and purify with it. She asked: Messenger of Allah, how should I purify with it ? 'Aishah said: I understood what he (the Prophet) said metaphorically. I, therefore, said to her: Remove the marks of blood.

Sunan Abi Dawud Book 1, Hadith 314 Next Hadith → Asma' asked the Prophet (ﷺ) and then narrated the rest of the tradition to the same effect. He (the Prophet) said: "a musk-scented piece of cloth." She (Asma') said: How should I purify with it ? He said: By glory of Allah ! Purify with it, and he covered his face with the cloth. This version also adds: "She asked about the washing because of sexual defilement." He said: Take your water and purify yourself as best as possible. Then pour water over yourself. 'Aishah said: The best of the women are the women of the Ansar. Shyness would not prevent them from inquiring about religion and from acquiring deep understanding in it.

Sunan Abi Dawud Book 1, Hadith 316