Musnad Ahmad 25:377

'Ali ibn 'Asim narrated to us, 'Abdullah ibn 'Uthman ibn Khuthaym informed me, from Sa'id ibn Jubayr, from Ibn 'Abbas, who said: The Messenger of Allah (may Allah bless him and grant him peace) said: "This Stone will come on the Day of Resurrection having two eyes with which it sees, and a tongue with which it speaks. It will bear witness for whoever touched it in truth."