(26) And strip Aaron of his garments.--Thus the same hands which had invested Aaron with the sacred garments were employed in divesting him of them, and, in both cases, in obedience to the express command of God. The removal of the priestly robes from Aaron may be regarded as typical of the future disannulling of his priesthood when a priest after the order of Melchizedek should arise. "The succession of the priesthood," says Dean Stanley (who refers to Ewald's Geschichte, 5:13), "was made through that singular usage, preserved even to the latest days of the Jewish hierarchy, by the transference of the vestments and drapery of the dead High Priest to the living successor." (Lectures on Jewish History, 1:182.)
20:22-29 God bids Aaron prepare to die. There is something of displeasure in these orders. Aaron must not enter Canaan, because he had failed in his duty at the waters of strife. There is much of mercy in them. Aaron, though he dies for his transgression, dies with ease, and in honour. He is gathered to his people, as one who dies in the arms of Divine grace. There is much significancy in these orders. Aaron must not enter Canaan, to show that the Levitical priesthood could make nothing perfect; that must be done by bringing in a better hope. Aaron submits, and dies in the method and manner appointed; and, for aught that appears, with as much cheerfulness as if he had been going to bed. It was a great satisfaction to Aaron to see his son, who was dear to him, preferred; and his office preserved and secured: especially, to see in this a figure of Christ's everlasting priesthood. A good man would desire, if it were the will of God, not to outlive his usefulness. Why should we covet to continue any longer in this world, than while we may do some service in it for God and our generation?
and put them upon Eleazar his son; thereby declaring him to be high priest in his father's stead:
and Aaron shall be gathered unto his people, and shall die there; the phrase of gathering to his people is here explained of his dying.