His words first referred to Aaron, prince of the tribe of Levi. He said: "Well may Thy Urim and Tummim belong to Aaron, who ministered services of love to Thy children, who stood every test that Thou didst put upon him, and who at the 'waters of rebellion' became the victim of a wrong accusation." God had then decreed against Aaron that he was to die in the desert, although not he, but Moses had trespassed against Him, saying to Israel, "Hear now, ye rebels."
As Aaron, prince of the tribe of Levi, when Israel was still in Egypt, declaimed passionately against the people because they worshipped idols, so too all the tribe of Levi stood up by God's standard when Israel worshipped the Golden Calf in the desert, and slew the idolaters, even if they were their half-brothers or their daughters sons. The Levites also were the only ones who, in Egypt as in the desert, remained true to God and His teachings, did not abandon the token of the covenant, and were not tempted to rebellion by the spies.
"Hence," continued Moses, "shall the Levites be the only ones from whose mouth shall issue judgement and instruction for Israel. 'Thy shall put incense' in the Holy of Holies, 'and whole burnt offerings upon His altar.' Their sacrifices shall reconcile Israel with God, and they themselves shall be blessed with earthly goods. Thou, Lord, 'smitest through the loins of them that rise up against them' that dispute the priestly rights of this tribe, Thou didst destroy Korah, and they 'that hated them' like king Uzziah, 'shall not rise again.'
'Bless, Lord, the substance of the Levites who give from the tithes that they receive one-tenth to the priests. Mayest Thou accept sacrifice from the hands of the priest Elijah upon mount Carmel, 'smite the loins' of his enemy Ahab, break the neck of the latter's false prophets, and may the enemies of the high priest Johanan rise not again."