Another matter, [God said to Moses:] ‘All the people descend to the grave and their eyes dim; you, your eyes did not dim. All the people tend to utensils crafted by flesh and blood, a coffin, bier, and shroud, but you are in shrouds crafted by Heaven, a coffin crafted by Heaven, a bier crafted in Heaven. Another matter, all the people, when they die, their relatives and neighbors tend to them, but you, I and My entourage tend to you.’ From where is it derived? It is as it is stated; “He buried him in the valley” (Deuteronomy 34:6).
The Extraordinary Death of Moses
Devarim Rabbah 9:5