This is the law of the house. In this instance "the house" must not be restricted to the temple proper, consisting of the holy place and the holy of holies, but extended to the whole free space encompassing the outer court, the quadrangular area of three thousand cubits square (Ezekiel 42:16-20); and concerning this house as so defined, the fundamental torah, law, or regulation, is declared to be that of its complete sanctity.
Ewald and Smend, as usual, unite with the LXX. in connecting "upon the top of the mountain" with "house;" but expositors generally agree that the clause belong to the words that follow, Upon the top of the mountain the whole limit thereof round about; and that the prophet's thought is that the entire territory upon the mountain summit included within the above specified border, and not merely the inner sanctuary, or even that with its chambers and courts, was to be regarded as most holy, or as a holy of holies, i.
e. was to be consecrated as the innermost adytum of the tabernacle and temple had been. by the indwelling of Jehovah. Smend notes that "This is the law" is the customary underwriting and superscription of the laws of the priest-code (see Le Ezekiel 6:9, Ezekiel 6:14; Ezekiel 7:1, 37; 11:46; Ezekiel 12:7; Ezekiel 13:1-23:59; 14:54; 15:32); but it need not result from this that the priest.
code borrowed this expression from Ezekiel, who employs it only in this verse. The more rational hypothesis is that Ezekiel, himself a priest, made use of this formula, because acquainted with it as already existing in the so-called priest-code.