ἐν πέτροισι πέτρον ἐκτρίβων → by grinding stone against stones
P. and V. ταμίας, ὁ, V. χρυσοφύλαξ, ὁ, θησαυροφύλαξ, ὁ, γαζοφύλαξ, ὁ.
