Les Proverbes 10:10 Midrash : Mekhilta DeRabbi Yishmael & Ein Yaakov (Glick Edition)

(Exodus 13:19) "And Moses took the bones of Joseph with him": This apprises us of the wisdom and saintliness of Moses. All of Israel were occupying themselves with the spoils (of Egypt), and Moses was occupying himself with the mitzvah of the bones of Joseph. Of him it is written (Mishlei 10:8) "The wise of heart will take mitzvoth." And how did Moses know where Joseph was buried? It was said: Serach the daughter of Asher was left of that generation, and she showed Moses the grave of Joseph, saying to him: In that spot did they place him. The Egyptians made a metal casket for him and sank it in the Nile. (Moses) thereupon stood at the Nile, threw a stone into it, and shouted: "Joseph, Joseph, the oath that the Holy One Blessed be He swore to our father Abraham that He would redeem His children, has materialized. Accord honor to the L–rd, the G–d of Israel, and do not delay our redemption, for it is on your behalf that we are delayed. If you reveal yourself, good; if not we are absolved of your oath (to take your bones with us)" — whereupon Joseph's casket rose to the surface and Moses took it.

MISHNAH: And the following were mentioned to their disgrace; those of the house of Garmu, who were unwilling to teach the art of making the show-bread; those of the house of Abtinas, who did not want to teach the art of preparing the incense; Hugras b. Levi, who knew a chapter in music which he was unwuilling to instruct others in; Ben Kamtzar did not want to teach the art of writing. Of the first [who gave excusses] it is said (Prov. 10, 10, 7) The memory of the just is blessed; but of the rest it is said (Ib.) But the name of the wicked shall rot.