Jamieson, Fausset and Brown on Hebrews 8:5

5. Who--namely, the priests.

serve unto the example--not "after the example," as Bengel explains. But as in He 13:10, "serve the tabernacle," that is, do it service: so "serve (the tabernacle which is but) the outline and shadow." The Greek for "example" is here taken for the sketch, copy, or suggestive representation of the heavenly sanctuary, which is the antitypical reality and primary archetype. "The mount" answers to heaven, He 12:22.

admonished--The Greek especially applies to divine responses and commands.

to make--"perfectly": so the Greek.

See--Take heed, accurately observing the pattern, that so thou mayest make, &c.

saith he--God.

the pattern--an accurate representation, presented in vision to Moses, of the heavenly real sanctuary. Thus the earthly tabernacle was copy of a copy; but the latter accurately representing the grand archetypical original in heaven (Ex 25:40).