Exodus 28:28

28:28 They are to tie the breastpiece by its rings to the rings of the ephod by blue cord, so that it may be above the waistband of the ephod, and so that the breastpiece will not be loose from the ephod.

Exodus 28:37

28:37 You are to attach to it a blue cord so that it will be on the turban; it is to be on the front of the turban,

Exodus 39:3

39:3 They hammered the gold into thin sheets and cut it into narrow strips to weave them into the blue, purple, and scarlet yarn, and into the fine linen, the work of an artistic designer.

Exodus 39:31

39:31 They attached to it a blue cord, to attach it to the turban above, just as the Lord had commanded Moses.