Exodus 39:21-23

The Voice

²¹ They connected the rings on the breast piece to the rings on the vest using blue cord, so that it would be attached above the vest’s waistband and not come loose from the vest. They did all this exactly as the Eternal One had instructed Moses.

²² He then made the robe worn under the vest blue. ²³ They made a hole for the head and formed a collar around the hole by lining it with extra material so that it might not tear.