Midrash su Genesi 50:9

R. Nathan was of the opinion that Joseph’s grave was in the royal tombs, since it is written: And they embalmed him (Gen. 50:26). How, then, did Moses know which one was Joseph’s coffin? He went to the tomb and stood among the coffins and called out: “Joseph, Joseph, the time has come for the Holy One, blessed be He, to redeem his children. The Shekhinah awaits you and Israel, and the clouds of glory await you. If you will make yourself appear good, but if not, we will be free of your vow.” Whereupon Joseph’s coffin began to stir, and Moses took it and departed. This teaches us that just as a man treats others, so they will treat him. Joseph buried his father, as it is said: And Joseph went up to bury his father;and with him went up all the servants … and his brothers (ibid., v. 7). Even though none of his brothers was as famous as he, since he was a ruler in the land, it is written: And he brought up with him both chariots and horses (ibid., v. 9). Therefore, he deserved to be taken from his grave by Moses himself (since he exerted himself in burying Jacob).