Moshe was commanded to make garments for the kohanim.
Moshe was commanded to make garments for the kohanim. Included in these was the eifod, a piece of clothing similar to an apron, with two shoulder straps on top holding the avnei shoham, gold settings that contained precious stones. Hashem told Moshe to engrave the names of the 12 sh’vatim (tribes) onto these stones as a remembrance. Rashi explains that this was so that the memory of Reuven, Shimon, Levi, etc. would be invoked when the Kohen Gadol did the avodah, and Hashem would then remember their righteousness.