Genesis 50:3

Forty days were required for it, for that is how many are required for embalming . And the Egyptians wept for him seventy days .

taking a full forty days, for that was the time required for embalming. And the Egyptians mourned for him seventy days.

And forty days were fulfilled for him; for so are fulfilled the days of those which are embalmed : and the Egyptians mourned for him threescore and ten days.