Musnad Ahmad 5:230

'Affan narrated to us, Mu'adh ibn Mu'adh narrated to us, Qays ibn al-Rabi' narrated to us, from Abu al-Miqdam, from 'Abd al-Rahman al-Azraq, from 'Ali, who said: The Messenger of Allah (peace and blessings of Allah be upon him) entered upon me while I was sleeping on the bed. Al-Hasan or al-Husayn asked for water. The Prophet (peace and blessings of Allah be upon him) stood up to a goat of ours that was bleating, and he milked it, and it gave milk. Al-Hasan came to him, and the Prophet (peace and blessings of Allah be upon him) pushed him away. Fatimah said: "O Messenger of Allah, it is as if he is the most beloved of them to you?" He said: "No, but he asked for water before him." Then he said: "Indeed, I, you, these two, and this sleeping one, will be in one place on the Day of Resurrection."