As a sign of especial favor God communicates to the pious the day of their death, that they may transmit their crowns to their sons. But God considered it particularly fitting to prepare Moses and Aaron for impending death, saying: "These two pious men throughout their lifetime did nothing without consulting Me, and I shall not therefore take them out of this world without previously informing them."
When, therefore, Aaron's time approached, God said to Moses: "My servant Moses, who hast been 'faithful in all Mine house,' I have an important matter to communicate to thee, but it weighs heavily upon Me." Moses: "What is it?" God: "Aaron shall be gathered unto his people; for he shall not enter into the land which I have given unto the children of Israel, because ye rebelled against My word at the waters of Meribah." Moses replied: "Lord of the world! It is manifest and known before the Throne of Thy glory, that Thou art Lord of all the world and of Thy creatures that in this world Thou hast created, so that we are in Thy hand, and in Thy hand it lies to do with us as Thou wilt. I am not, however, fit to go to my brother, and repeat to him Thy commission, for he is older than I, and how then shall I presume to go up to my older brother and say, 'Go up unto Mount Hor and die there!'" God answered Moses: "Not with the lip shalt thou touch this matter, but 'take Aaron and Eleazar his son, and bring them up unto Mount Hor.' Ascend thou also with them, and there speak with thy brother sweet and gentle words, the burden of which will, however, prepare him for what awaits him. Later when ye shall all three be upon the mountain, 'strip Aaron of his garments, and put them upon Eleazar his son, and Aaron shall be gathered unto his people, and shall die there.' As a favor to Me prepare Aaron for his death, for I am ashamed to tell him of it Myself."