Exodus 39:28-31

28They also used good linen to make Aaron's special hat, as well as hats for the other priests. They used special soft linen to make the trousers that they wore next to their skin.

29A worker used special skills to make the long belt, so that it looked beautiful. He used blue, purple and red materials to make it, as the Lord had commanded Moses.

30The workers used pure gold to make a thin plate as a holy sign. They wrote these words on it carefully with a sharp tool: ‘Holy to the Lord’.

31They fixed a blue string to the plate, to tie it to the front of the special hat. The Lord had commanded Moses to do this.