Sayyiduna Salamah bin Qays al-Ashja'i (may Allah be pleased with him) narrated that during the Farewell Hajj, the Messenger of Allah (peace and blessings be upon him) said: "Beware, they are only four things" (and today I hold on to them as firmly as I did on the day I heard them from the Messenger of Allah (peace and blessings be upon him)): "Do not associate anything with Allah, do not kill the soul that Allah has made sacred except by right, do not commit adultery, and do not steal."
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 6289