Exodus 28:11

28:11 You are to engrave the two stones with the names of the sons of Israel with the work of an engraver in stone, like the engravings of a seal; you are to have them set in gold filigree settings.

Exodus 28:13-14

28:13 You are to make filigree settings of gold 28:14 and two braided chains of pure gold, like a cord, and attach the chains to the settings.

Exodus 28:25

28:25 the other two ends of the two chains you will attach to the two settings and then attach them to the shoulder pieces of the ephod at the front of it.