A golden bell and a pomegranate, a golden bell and a pomegranate, upon the hem of the robe round about.

Jamieson-Fausset-Brown Bible Commentary

34. a golden bell and a pomegranate-The bells were hung between the pomegranates, which were said to have amounted to seventy-two, and the use of them seems to have been to announce to the people when the high priest entered the most holy place, that they might accompany him with their prayers, and also to remind himself to be attired in his official dress, to minister without which was death.

Matthew Henry's Concise Commentary

28:31-39 The robe of the ephod was under the ephod, and reached down to the knees, without sleeves. Aaron must minister in the garments appointed. We must serve the Lord with holy fear, as those who know they deserve to die. A golden plate was fixed on Aaron's forehead, engraven with Holiness to the Lord. Aaron was hereby reminded that God is holy, and that his priests must be holy, devoted to the Lord. This must appear in their forehead, in open profession of their relation to God. It must be engraven like the engravings of a signet; deep and durable; not painted so as to be washed off, but firm and lasting; such must our holiness to the Lord be. Christ is our High Priest; through him sins are forgiven to us, and not laid to our charge. Our persons, our doings, are pleasing to God upon the account of Christ, and not otherwise.