Genesis 50:3

“Forty days were fulfilled for him, etc.] Were spent in embalming him: for so are fulfilled the days of those that are embalmed; so long the body lay in the pickle, in ointment of cedar, myrrh and cinnamon, and other things, that it might soak and penetrate thoroughly into it: and so Diodorus Siculus f1918 says, that having laid more than thirty days in such a state, it was delivered to the kindred of the deceased: and the Egyptians mourned for him seventy days; during the time of their embalming him; for longer than seventy days the body might not lie in the pickle, as before observed, from Herodotus. According to Diodorus Siculus f1919, the Egyptians used to mourn for their kings seventy…”

“the Egyptians mourned, &c. It was made a period of public mourning, as on the death of a royal personage.”

“- The Burial of Jacob 10. אטד 'āṭâd Atad, “the buck-thorn.” 11. מצרים אבל 'ābêl-mı̂tsrayı̂m, Abel-Mitsraim, “mourning of Mizraim,” or meadow of Mizraim. This chapter records the burial of Jacob and the death of Joseph, and so completes the history of the chosen family, and the third bible for the instruction of man. Genesis 50:1-3 After the natural outburst of sorrow for his deceased parent, Joseph gave orders to embalm the body, according to the custom of Egypt. “His servants, the physicians.” As the grand vizier of Egypt, he has physicians in his retinue. The classes and functions of the physicians in Egypt may be learned from Herodotus (ii. 81-86). There were special physicians for…”

“50:3 the Egyptians mourned for Jacob for seventy days, just two days short of the mourning period for a pharaoh. This showed the great respect that the Egyptians had for Joseph.”