4. As to the Duodecad, in connection with which the mystery of the passion of the defect occurred, from which passion they maintain that all things visible were framed, they assert that is to be found strikingly and manifestly everywhere [in Scripture]. For they declare that the twelve sons of Jacob, from whom also sprung twelve tribes,—the breastplate of the high priest, which bore twelve precious stones and twelve little bells,—the twelve stones which were placed by Moses at the foot of the mountain,—the same number which was placed by Joshua in the river, and again, on the other side, the bearers of the ark of the covenant,—those stones which were set up by Elijah when the heifer was offered as a burnt-offering; the number, too, of the apostles; and, in fine, every event which embraces in it the number twelve,—set forth their Duodecad. And then the union of all these, which is called the Triacontad, they strenuously endeavour to demonstrate by the ark of Noah, the height of which was thirty cubits; by the case of Samuel, who assigned Saul the chief place among thirty guests; by David, when for thirty days he concealed himself in the field; by those who entered along with him into the cave; also by the fact that the length (height) of the holy tabernacle was thirty cubits; and if they meet with any other like numbers, they still apply these to their Triacontad.