23 And the Lord said to Moses and Aaron at Mount Hor, on the border of the land of Edom, 24 "Aaron shall be gathered to his people; for he shall not enter the land which I have given to the people of Israel, because you rebelled against my command at the waters of Mer'ibah. 25 Take Aaron and Elea'zar his son, and bring them up to Mount Hor; 26 and strip Aaron of his garments, and put them upon Elea'zar his son; and Aaron shall be gathered to his people, and shall die there." 27 Moses did as the Lord commanded; and they went up Mount Hor in the sight of all the congregation. 28 And Moses stripped Aaron of his garments, and put them upon Elea'zar his son; and Aaron died there on the top of the mountain. Then Moses and Elea'zar came down from the mountain. 29 And when all the congregation saw that Aaron was dead, all the house of Israel wept for Aaron thirty days.
Matthew Henry's Commentary on Numbers 20:23-29
Commentary on Numbers 20:22-29
(Read Numbers 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?