Musannaf Ibn Abi Shayba 37:105

Abdullah ibn Numayr narrated to us, from al-Hasan ibn Amr, from Abu al-Zubayr, from Abdullah ibn Amr, who said: I heard the Messenger of Allah, peace and blessings of Allah be upon him, saying: "Indeed, there will be in my nation (Ummah) sinking into the earth (khasf), transformation into animals (maskh), and pelting with stones (qadhf)."