Exodus 39:28-31

28the turban of fine linen, the headwear, the linen undergarments of finely twisted linen,

29along with the tunic of checkered work, in blue, purple and scarlet, the work of a color weaver, as Adonai commanded Moses.

30Finally they made the plate of the holy coronet from pure gold, and wrote an inscription on it, like the engraving of a signet seal: HOLY TO Adonai.

31They tied to it a blue thread, to fasten onto the turban above, as Adonai commanded Moses.