Exodus 28:21-25

The stones shall be engraved according to the names of the sons of Israel: twelve, according to their names; they shall be like the engravings of a signet, each according to his name for the twelve tribes.

You shall also make on the breastpiece twisted chains of cord work in pure gold.

And you shall make on the breastpiece two rings of gold, and shall put the two rings on the two ends of the breastpiece.

And you shall put the two cords of gold on the two rings at the ends of the breastpiece.

You shall put the other two ends of the two cords on the two filigree settings, and put them on the shoulder pieces of the ephod, at the front of it.