Exodus 28:31-35

³¹“You shall make the robe of the ephod all of blue. ³²There shall be an opening at its top in the middle of it; around its opening there shall be a binding of woven work, like the opening of a coat of mail, so that it will not be torn. ³³You shall make on its hem pomegranates of blue and purple and scarlet material, all around on its hem, and bells of gold between them all around: ³⁴a golden bell and a pomegranate, a golden bell and a pomegranate, all around on the hem of the robe. ³⁵It shall be on Aaron when he ministers; and its tinkling shall be heard when he enters and leaves the holy place before the Lord, so that he will not die.