Exodus 28:6-12
6-14. ephod—It was a very gorgeous robe made of byssus, curiously embroidered, and dyed with variegated colors, and further enriched with golden tissue, the threads of gold being either originally interwoven or afterwards inserted by the embroiderer. It was short—reaching from the breast to a little below the loins—and though destitute of sleeves, retained its position by the support of straps thrown over each shoulder. These straps or braces, connecting the one with the back, the other with the front piece of which the tunic was composed, were united on the shoulder by two onyx stones, serving as buttons, and on which the names of the twelve tribes were engraved, and set in golden encasements. The symbolical design of this was, that the high priest, who bore the names along with him in all his ministrations before the Lord, might be kept in remembrance of his duty to plead their cause, and supplicate the accomplishment of the divine promises in their favor. The ephod was fastened by a girdle of the same costly materials, that is, dyed, embroidered, and wrought with threads of gold. It was about a handbreadth wide and wound twice round the upper part of the waist; it fastened in front, the ends hanging down at great length (Re 1:13).
Exodus 28:15-30
15-29. thou shalt make the breastplate of judgment with cunning work—a very splendid and richly embroidered piece of brocade, a span square, and doubled, to enable it the better to bear the weight of the precious stones in it. There were twelve different stones, containing each the name of a tribe, and arranged in four rows, three in each. The Israelites had acquired a knowledge of the lapidary's art in Egypt, and the amount of their skill in cutting, polishing, and setting precious stones, may be judged of by the diamond forming one of the engraved ornaments on this breastplate. A ring was attached to each corner, through which the golden chains were passed to fasten this brilliant piece of jewelry at the top and bottom tightly on the breast of the ephod.
30. thou shalt put in the breastplate of judgment the Urim and Thummim—The words signify "lights" and "perfections"; and nothing more is meant than the precious stones of the breastplate already described (compare Ex 39:8-21; Le 8:8). They received the name because the bearing of them qualified the high priest to consult the divine oracle on all public or national emergencies, by going into the holy place—standing close before the veil and putting his hand upon the Urim and Thummim, he conveyed a petition from the people and asked counsel of God, who, as the Sovereign of Israel, gave response from the midst of His glory. Little, however, is known about them. But it may be remarked that Egyptian judges wore on the breast of their official robes a representation of Justice, and the high priest in Israel long officiated also as a judge; so that some think the Urim and Thummim had a reference to his judicial functions.
Hebrews 4:14
14. Seeing then—Having, therefore; resuming Heb 2:17.
great—as being "the Son of God, higher than the heavens" (Heb 7:26): the archetype and antitype of the legal high priest. passed into the heavens—rather, "passed through the heavens," namely, those which come between us and God, the aerial heaven, and that above the latter containing the heavenly bodies, the sun, moon, &c. These heavens were the veil which our High Priest passed through into the heaven of heavens, the immediate presence of God, just as the Levitical high priest passed through the veil into the Holy of Holies. Neither Moses, nor even Joshua, could bring us into this rest, but Jesus, as our Forerunner, already spiritually, and hereafter in actual presence, body, soul, and spirit, brings His people into the heavenly rest. Jesus—the antitypical Joshua (Heb 4:8). hold fast—the opposite of "let slip" (Heb 2:1); and "fall away" (Heb 6:6). As the genitive follows, the literally, sense is, "Let us take hold of our profession," that is, of the faith and hope which are subjects of our profession and confession. The accusative follows when the sense is "hold fast" [TITTMANN].