Musnad Ahmad 1153:1952

Zayd ibn al-Hubab narrated to us, he said: Umar ibn Abi Wahb al-Nasri informed me, he said: Musa narrated to me, from Talhah ibn Ubayd Allah ibn Kurayz al-Khuza'i, from Aisha, that the Messenger of Allah, peace and blessings of Allah be upon him, used to, when he performed ablution, comb his beard with water.