Musnad Ahmad 1188:0

Narrated Umm Ishaq, the freedwoman of Umm Hakim: She said: I heard the Messenger of Allah (ﷺ) say while he was performing the Hajj, and he was at the Jamrah, throwing pebbles: "With the like of these, throw. And beware of extremism in religion, for those before you were only destroyed by extremism in religion."