Jamieson, Fausset and Brown on Haggai 2:12

12. "Holy flesh" (that is, the flesh of a sacrifice, Jr 11:15), indeed, makes holy the "skirt" in which it is carried; but that "skirt" cannot impart its sanctity to any thing beyond, as "bread," &c. (Le 6:27). This is cited to illustrate the principle, that a sacrifice, holy, as enveloping divine things (just as the "skirt" is "holy" which envelops "holy" flesh), cannot by its inherent or opus operatum efficacy make holy a person whose disobedience, as that of the Jew while neglecting God's house, made him unholy.