" Should I undo the plait and wash it, because of sexual intercourse?" and there is no mention of menstruation.
Sahih Muslim Book 3, Hadith 68
← Previous Hadith This hadith has been narrated by Amr al-Naqid, Yazid b. Harun, 'Abd b. Humaid, Abd al-Razzaq, Thauri, Ayyub b. Musa, with the same chain of transmitters. In hadith narrated by Abd al-Razzaq there is a mention of the menstruation and of the sexual intercourse. The rest of the hadith has been transmitted like that of Ibn 'Uyaina.

Sahih Muslim Book 3, Hadith 67 Next Hadith → It was conveyed to 'A'isha that 'Abdullah b. 'Amr ordered the women to undo the (plaits) of hair on their heads. She said: How strange it is for Ibn 'Amr that he orders the women to undo the plaits of their head while taking a bath; why does he not order them to shave their beads? I and the Messenger of Allah (ﷺ) took bath from one vessel. I did no more than this that I poured three handfuls of water over my head.

Sahih Muslim Book 3, Hadith 69