“You shall make a plate of pure gold and engrave on it, like the engraving of a signet, ‘Holy to the LORD.’
36. And thou shalt make a plate. It is not without reason that this inscription is placed upon the priest’s forehead, that it may be conspicuous; for not only did God thus testify that the legal priesthood was approved of, and acceptable to Him, since He had consecrated it by His word, but also that holiness was not to be sought elsewhere.
Here is, 1. Direction given concerning the robe of the ephod, Exo 28:31-35. This was next under the ephod, and reached down to the knees, was without sleeves, and was put on over their head, having holes on the sides to put the arms through, or, as Maimonides describes it, was not sewed together on the sides at all.
Commenting on Exodus 28:31-39
And thou shalt put it on a blue lace,.... The plate of gold: that it may be upon the mitre; either the plate or the lace; the lace is the nearest antecedent, but it seems by what follows it should be the plate: upon the forefront of the mitre it shall be; the plate of gold; the mitre was of linen, a wrap of linen...