Exodus 39:22-26

²²Then he made the robe of the ephod of woven work, all of blue; ²³and the opening of the robe was at the top in the center, as the opening of a coat of mail, with a binding all around its opening, so that it would not be torn. ²⁴They made pomegranates of blue and purple and scarlet material and twisted linen on the hem of the robe. ²⁵They also made bells of pure gold, and put the bells between the pomegranates all around on the hem of the robe, ²⁶alternating a bell and a pomegranate all around on the hem of the robe for the service, just as the Lord had commanded Moses.