Plutarch, Life of Lycurgus of Sparta 6:
"So eagerly set was he upon this establishment, that he took the trouble to obtain an oracle about it from Delphi, the Rhetra, which runs thus:
"After that you have built a temple to Jupiter Hellanius, and to Minerva Hellania, and after that you have phyle'd the people phyles, and obe'd them into obes, you shall establish a council of thirty elders, the leaders included, and shall, from time to time, apellazein the people betwixt Babyca and Cnacion, there propound and put to the vote. The commons have the final voice and decision."
By phyles and obes are meant the divisions of the people; by the leaders, the two kings; apellazein, referring to the Pythian Apollo, signifies to assemble; Babyca and Cnacion they now call Oenus; Aristotle says Cnacion is a river, and Babyca a bridge. Betwixt this Babyca and Cnacion, their assemblies were held, for they had no council-house or building, to meet in. Lycurgus was of opinion that ornaments were so far from advantaging them in their counsels, that they were rather an hindrance, by diverting their attention from the business before them to statues and pictures, and roofs curiously fretted, the usual embellishments of such places amongst the other Greeks. The people then being thus assembled in the open air, it was not allowed to any one of their order to give his advice, but only either to ratify or reject what should be propounded to them by the king or senate.
But because it fell out afterwards that the people, by adding or omitting words, distorted and perverted the sense of propositions, kings Polydorus and Theopompus inserted into the Rhetra, or grand covenant, the following clause:
"That if the people decide crookedly, it should be lawful for the elders and leaders to dissolve;"that is to say, refuse ratification, and dismiss the people as depravers and perverters of their counsel. It passed among the people, by their management, as being equally authentic with the rest of the Rhetra, as appears by these verses of Tyrtaeus, --
These oracles they from Apollo heard, And brought from Pytho home the perfect word: The heaven-appointed kings, who love the land, Shall foremost in the nation's council stand; The elders next to them; the commons last; Let a straight Rhetra among all be passed."
Source...