Musnad Ahmad 1153:1953

Ali ibn Ishaq narrated to us, he said: Abdullah—meaning Ibn al-Mubarak—informed us, he said: Umar ibn Abi Wahb al-Khuza'i informed us, he said: Musa ibn Tharwan narrated to me, from Talhah ibn Ubayd Allah ibn Kurayz al-Khuza'i, from Aisha, she said: When the Messenger of Allah (peace and blessings of Allah be upon him) performed ablution, he would rake his beard with water.