Exodus 28:15

The most considerable of the ornaments of the high priest was this breast — plate, a rich piece of cloth curiously wrought with gold and purple, two spans long, and a span broad; so that, being doubled, it was a span square. In this breast — plate, the tribes of Israel were recommended to God's favour in twelve precious stones. Some question whether Levi had a precious stone with his name on or no; if not Ephraim and Manasseh were reckoned distinct, as Jacob had said they should be, and the high priest himself being head of the tribe of Levi, sufficiently represented that tribe. Aaron was to bear their names for a memorial before the Lord continually, being ordained for men, to represent them in things pertaining to God; herein typifying our great High Priest, who always appears in the presence of God for us. The name of each tribe was engraven in a precious stone, to signify how precious, in God's sight, believers are, and how honourable, Isaiah 43:4. The high priest had the names of the tribes both on his shoulders and on his breast, noting both the power and the love with which our Lord Jesus interceeds for us. How near should Christ's name lie to our hearts, since he is pleased to lay our names so near his? And what a comfort is it to us, in all our addresses to God, that the great High Priest of our profession has the names of all his Israel upon his breast, before the Lord, for a memorial, presenting them to God?