מדרש אויף שמות 28:15

“With the insignias” – there were insignias for each and every prince: a banner with a color for each, and every banner like the color of the gems that were on Aaron’s heart,⁷The high priest wore the choshen, a breastplate which had on it twelve different precious stones, each with a name of one of the tribes (Exodus 28:15–21). from which the empire learned to make a banner, with colors for each and every banner. For each and every tribe, the prince’s banner was like the color of his stone. Reuben, its stone was a ruby and its banner was dyed red, and mandrakes were depicted on it. Simeon, [its stone was] a peridot, its banner was dyed green, and Shekhem was depicted on it. Levi, [its stone was] an emerald, its banner was dyed one-third white, one-third black, and one-third red, and the urim and tumim were depicted on it.
Judah, [its stone was] a turquoise, the color of its banner was in its image, like the heavens, and a lion was depicted on it. Issachar, [its stone was] a sapphire, its banner was dyed bluish-black, and the sun and the moon were depicted on it, based on: “From the children of Issachar, possessors of understanding of the times” (I Chronicles 12:33). Zebulun, [its stone was] a clear quartz, the color of its banner, white, and a ship was depicted on it, based on: “Zebulun will dwell at the seashore, [and he shall be a shore for ships]” (Genesis 49:13).
Dan, [its stone was] a jacinth, the color of its banner was like a sapphire, and a serpent was depicted on it, based on: “Dan will be a serpent” (Genesis 49:17). Gad, [its stone was] an agate, and the color of its banner was neither white nor black, but rather white and black intermingled, and an encampment was depicted on it, based on: “Gad will wage war by regiment” (Genesis 49:19). Naphtali, [its stone was] an amethyst, the color of its banner was similar to clear wine whose redness is not deep, and a hind was depicted on it, based on: “Naphtali is a hind let loose” (Genesis 49:21).
Asher, [its stone was] a beryl, and the color of its banner was like the gem⁸Of that name. with which women adorn themselves, and an olive tree was depicted on it, based on: “From Asher, his bread is rich [shemena]” (Genesis 49:20).⁹The allusion to the olive tree is based on the fact that it produced olive oil [shemen]. Joseph, [its stone was] onyx, the color of its banner was exceedingly black, and it was depicted for two princes, Ephraim and Manasseh: Egypt, because they were born in Egypt.¹⁰The banners of Ephraim and Manasseh shared the same background. On the banner of Ephraim an ox was depicted, based on: “The firstborn of his bull [is his majesty]” (Deuteronomy 33:17); this is Joshua bin Nun, who was from the tribe of Ephraim. On the banner of Manasseh, an aurochs, based on: “And his horns are the horns of an aurochs” (Deuteronomy 33:17); this is Gideon son of Yoash, who was from the tribe of Manasseh. Benjamin, [its stone was] a chalcedony, the color of his banner was like all the colors of the twelve colors, and a wolf was depicted on it, based on: “Benjamin is a mauling wolf” (Genesis 49:27). That is why it is stated: “With the insignias,” as each and every prince had his own sign.

(Numb. 16:1:) NOW KORAH < … > TOOK. <What> he took <was> his prayer shawl, when he went to get counsel from his wife.¹¹Tanh., Numb.5:3; Numb.R. 18:4. When the Holy One said (in Numb. 8:6–7): TAKE THE LEVITES FROM AMONG THE CHILDREN OF ISRAEL AND PURIFY THEM. NOW THIS IS WHAT YOU SHALL DO FOR THEM TO PURIFY THEM …, AND HAVE THEM PASS A RAZOR OVER ALL OF THEIR FLESH. He immediately did so to Korah. He began to go around all Israel, but they did not recognize him. They said to him: Who did this to you? He told them: Moses. And not only that but taking me by my hands and by my feet, they waved me (like an offering). Then he said to me: See, you are purified. Moreover, he brought his brother Aaron, adorned him like a bride, and had him sit in the tent of meeting. The enemies of Moses immediately began to incite Israel against him. So they said: Moses is king, his brother Aaron is high priest, and his children are deputy high priests! The priest has a priestly offering (terumah); the priest has a priestly offering from the tithe¹²See Ter. 4:1.; the priest has twenty-four priestly gifts!¹³See THal. 2:7-10 for a listing. Immediately (in Numb. 16:3) THEY GATHERED TOGETHER AGAINST MOSES AND AGAINST AARON, AND THEY SAID UNTO THEM: YOU HAVE GONE TOO FAR (RB), FOR ALL THE CONGREGATION ARE HOLY, EVERY ONE OF THEM, AND THE LORD IS IN THE MIDST OF THEM. SO WHY DO YOU ELEVATE YOURSELVES OVER THE COMMUNITY OF THE LORD? R. Levi said: At that very time Korah gathered his company and said to them (i.e., to Moses and Aaron): You have increased (rt.: RBH) the burden upon us to be more than the slavery of Egypt. We were better off under the Egyptians than under your authority, for in each and every year fifteen thousand and forty-five of us die.¹⁴As the yearly punishment for the sin of the spies amortized over forty years, during which a whole generation Israelites died in the desert (Numb. 14:20–24.) Now they wished to stone him; therefore (according to vs. 4), WHEN MOSES HEARD THIS, HE FELL ON HIS FACE. Moses said to them: I do not desire kingship, nor does Aaron <desire> high priesthood. Thus it is stated (in vs. 11): AND AS FOR AARON, WHAT IS HE THAT YOU SHOULD MURMUR AGAINST HIM? Moses said to the Holy One: Sovereign of the world, did you not command me thus (in Exod. 28:1): AND YOU SHALL BRING NEAR UNTO YOURSELF <YOUR BROTHER AARON AND HIS SONS ALONG WITH HIM,… TO SERVE ME AS PRIESTS>? Now they have arisen against us to kill us. He said to him (in Numb. 16:5): IN THE MORNING THE LORD WILL MAKE KNOWN <THOSE WHO BELONG TO HIM….> {From where?} [What does this mean?] R. Nathan said: The Holy One said: If all the magicians of the world gathered together and tried to turn the morning into the evening, they would be unable <to do so>; but just as I <formerly> separated the light and the darkness (in Gen. 1:4), so have I separated out Aaron to sanctify him as most holy. Immediately (in Numb. 16:12): THEN MOSES SENT TO SUMMON DATHAN AND ABIRAM, SONS OF ELIAB, BUT THEY SAID: WE WILL NOT COME UP. "We will not go" or "We will not come" is not written here, but WE WILL NOT COME UP. (Prov. 18:7:) A FOOL's MOUTH IS HIS RUIN! They opened their mouth about descending by saying that ascent was not for them. Just as they spoke, so did they die (according to Numb. 16:33): SO THEY AND ALL THAT BELONGED TO THEM WENT DOWN ALIVE TO SHEOL. Moses said: In as much as they did not want to come <to me>, I shall go to them. Perhaps they will be ashamed and repent. It is so stated (in Numb. 16:25): THEN MOSES AROSE AND WENT UNTO DATHAN AND ABIRAM. When they saw him they began to reproach and revile <him>, as stated (in vs. 27): AND DATHAN AND ABIRAM CAME OUT STANDING (rt.: NTsB). Does one go out sitting, kneeling, or lying prostrate?¹⁵The point here is that to mention that Dathan and Abiram were standing seems unnecessary and therefore implies some deeper meaning. It is simply that they went out reproaching and reviling <Moses>. Going out and standing upright (rt.: YTsB) is mentioned here. Now going out and standing upright (rt.: NTsB) is mentioned below in reference to Goliath the Philistine, where it is written (in I Sam. 17:4, 16): AND THERE WENT OUT A CHAMPION <FROM THE CAMP OF THE PHILISTINES [….] THEN THE PHILISTINE DREW NEAR AT DAWN AND IN THE EVENING, AND HE TOOK HIS STAND (rt.: YTsB) FOR FORTY DAYS. Just as going out and standing upright (rt.: NTsB) involved reproaching and reviling in that case,¹⁶The reproaching and reviling is specifically mentioned in I Sam.17:8-10. so also in this case did going out and standing upright (rt.: NTsB) involve reproaching and reviling. Moses therefore began by saying (in Numb. 16:29, 32): IF <THESE PEOPLE DIE> THE COMMON DEATH OF EVERY PERSON…. AND THE EARTH OPENED ITS MOUTH <AND SWALLOWED THEM>…. Come and see how harmful dissension must be! Whenever anyone foments dissension, the Holy One eradicates his memory. Thus it is stated (in Numb. 16:35): AND A FIRE WENT FORTH FROM THE LORD AND CONSUMED THE TWO HUNDRED AND FIFTY MEN <COFFERING THE INCENSE>. R. Berekhyah said: How harmful dissension must be! An emissary of the court on high only imposes a penalty¹⁷QNS; cf. Lat.: censere, which can mean “to tax.” <on people> from the age of twenty years, while the court below <only imposes a penalty > from the age of thirteen years. In the case of Korah's dissension, however, one-day-old babies were burned and swallowed up in nethermost Sheol. Thus it is written (in Numb. 16:27, 33): <AND DATHAN AND ABIRAM CAME OUT STANDING AT THE ENTRANCE OF THEIR TENTS <WITH THEIR WIVES, THEIR CHILDREN, AND THEIR LITTLE ONES <….> SO THEY AND ALL THAT BELONGED TO THEM WENT DOWN ALIVE TO SHEOL. It is therefore stated (Numb. 16:1): NOW KORAH < … > TOOK.

7) Likewise, R. Yehudah says (Shemoth 30:18): "And you shall make a laver of copper, and its pedestal, of copper, for washing": I might think that the pedestal could serve for ablution just as the laver does; it is, therefore, written "copper," "copper" (twice) — it is likened (to the laver) only in respect of its being copper, and not in respect to washing. Likewise, R. Yehudah says (Shemot 28:15): "And you shall make a breastplate (choshen) of judgment, artistic work; like the work of the ephod shall you make it." I might think that just as this (the choshen) was doubled, so, that (the ephod) was to be doubled; it is, therefore, written: "of gold": It (the ephod) is similar to it (the choshen) only in respect to gold, but not in respect to doubling.