Musnad Ahmad 27:1145

I read to Abu Qurrah Musa ibn Tariq, he said: Musa ibn Uqbah said: And Nafi’ said: When Abdullah would return from Hajj or Umrah, he would make his camel kneel at al-Batha, which is at Dhu al-Hulayfah. And Abdullah narrated to him, "That the Messenger of Allah, peace and blessings of Allah be upon him, used to camp there until he prayed the morning prayer."