Sahih Muslim Book 4, Hadith Number 1017.

Chapter : The excellence of the prayer and the way it is begun and the excellence of Ruku’ and moderation in it and prostration and moderation in it, etc.

Abu Juhaifa reported: The Messenger of Allah (may peace be upon him) went at noon towards al-Batha’, he performed ablution, and said two rak’ahs of the Zuhr prayer and two of the ‘Asr prayer, and there was a spear in front of him. Shu’ba said and Aun made this addition to it on the authority of his father Abu Juhaifa: And the woman and the donkey passed behind it.