Exodus 28:33-37

You shall make on its hem pomegranates of violet, purple, and scarlet material all around on its hem, and bells of gold between them all around:

a golden bell and a pomegranate, a golden bell and a pomegranate, all around on the hem of the robe.

It shall be on Aaron when he ministers; and its sound shall be heard when he enters and leaves the Holy Place before the Lord, so that he will not die.

“You shall also make a plate of pure gold and engrave on it, like the engravings of a signet, ‘Holy to the Lord.’

You shall fasten it on a violet cord, and it shall be on the turban; it shall be at the front of the turban.