PSALMS MATERIAL IN COPTIC inscribed on the wall of Cave T8 at Jabal al-Tarif near Nag Hammadi, Egypt (where the Nag Hammadi Coptic Gnostic library was found). According to this site the inscription gives the beginning lines of the Book of Psalms, and its paleography and the associated artifacts in the cave date it to the late sixth/early seventh century CE.
Via Chuck Jones on Facebook.
