Cyril of Alexandria, on Exod 28:21

“And they shall have the names of the children of Israel: with twelve names shall they be engraved, each stone with the name of one according to the twelve tribes.”

“And on the breast of the high priest were certain stones hanging, twelve in number, in the midst of which were placed two other stones, manifestation and truth. By means of a riddle through these the chorus of the holy apostles is clearly signified being, as it were, in a circle around Emmanuel, who is manifestation and truth. For he manifested the truth by having taken away the worship of God in shadows and in types.”

Imported from an open dataset — not yet checked against the printed edition.