Genesis 50:3

And they fulfilled forty days for him, for so are the days of embalming numbered; and Egypt mourned for him seventy days.

And they fulfilled forty days for him, for so are the days of embalming numbered; and Egypt mourned for him seventy days.

Forty days were used for him, for that is how many days it takes to embalm. The Egyptians wept for Israel for seventy days.

So fourtie dayes were accomplished (for so long did the dayes of them that were enbaumed last) and the Egyptians bewayled him seuentie dayes.