Musnad Ahmad 25:540

Hassan ibn Musa narrated to us, he said: Thabit Abu Zayd narrated to us, from Abdullah ibn Uthman ibn Khuthaym, from Sa'id ibn Jubayr, from Ibn Abbas, who said: The Messenger of Allah, peace and blessings of Allah be upon him, said: "Verily, this stone has a tongue and two lips; it will testify on the Day of Resurrection for whoever touched it, in truth."