Adam Clarke, on Esth 1:19

“If it please thee, let an edict go out from thy presence, and let it be written according to the law of the Persians and of the Medes, which must not be altered, that Vasthi come in no more to the king, but another, that is better than her, be made queen in her place.”

“That it be not altered - Let it be inserted among the permanent laws, and made a part of the constitution of the empire. Perhaps the Persians affected such a degree of wisdom in the construction of their laws, that they never could be amended, and should never be repeated. And this we may understand to be the ground of the saying, The laws of the Medes and Persians, that change not.”

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