Exodus 39:20-22

Young's Literal Translation

²⁰ and they make two rings of gold, and put them on the two shoulders of the ephod below, over-against its front, over-against its joining, above the girdle of the ephod;

²¹ and they bind the breastplate by its rings unto the rings of the ephod, with a ribbon of blue, to be above the girdle of the ephod, and the breastplate is not loosed from off the ephod, as Jehovah hath commanded Moses.

²² And he maketh the upper robe of the ephod, work of a weaver, completely of blue;