Exodus 39:22-26

They made the robe of the ephod entirely of blue cloth—the work of a weaver— with an opening in the center of the robe like the opening of a collar, and a band around this opening, so that it would not tear. They made pomegranates of blue, purple and scarlet yarn and finely twisted linen around the hem of the robe. And they made bells of pure gold and attached them around the hem between the pomegranates. The bells and pomegranates alternated around the hem of the robe to be worn for ministering, as the LORD commanded Moses.