Musnad Ahmad 723:4

Hashim narrated to us, he said: Abu Mu'awiyah—meaning Shayban—narrated to us, Mansur narrated to us, from Hilal ibn Yasaf, from Salamah ibn Qays al-Ashja'i, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said during the Farewell Pilgrimage: "Behold, they are but four: that you do not associate anything with Allah, and do not kill the soul which Allah has forbidden except by right, and do not commit adultery, and do not steal." He said: I have not been more eager to uphold them than I was from the moment I heard them from the Messenger of Allah (peace and blessings of Allah be upon him).