Exodus 28:35-37

Revised Standard Version

³⁵ And it shall be upon Aaron when he ministers, and its sound shall be heard when he goes into the holy place before the Lord, and when he comes out, lest he die.

³⁶ “And you shall make a plate of pure gold, and engrave on it, like the engraving of a signet, ‘Holy to the Lord.’ ³⁷ And you shall fasten it on the turban by a lace of blue; it shall be on the front of the turban.