Musnad Ahmad 5:295

Abdullah narrated to us, Abu al-Sha'tha' Ali ibn al-Hasan ibn Sulayman narrated to me, Sulayman ibn Hayyan narrated to us, from Mansur ibn Hayyan, he said: I heard Amir ibn Wathilah say: It was said to Ali ibn Abi Talib, "Inform us of something the Messenger of Allah, peace and blessings of Allah be upon him, confided in you." He said: "The Messenger of Allah, peace and blessings of Allah be upon him, did not confide in me anything and conceal it from the people. However, I heard him say: 'May Allah curse the one who curses his parents, and may Allah curse the one who alters the boundaries of the land, and may Allah curse the one who shelters an innovator.'"