Exodus 28:31-35

31And thou shalt make the robe of the ephod all of blue. 32And there shall be an hole in the top of it, in the midst of it: it shall have a binding of woven work around its hole, as the hole of a coat of mail, that it be not rent. 33And beneath upon the hem of it thou shalt make pomegranates of blue, and of purple, and of scarlet, all around on its hem; and bells of gold between them all around:1 34A golden bell and a pomegranate, a golden bell and a pomegranate, upon the hem of the robe around it. 35And it shall be upon Aaron to minister: and his sound shall be heard when he goeth in to the holy place before the LORD, and when he cometh out, that he may not die.