John Chrysostom
He grieved for him for forty days, the duration of his entombment, and 'Egypt mourned for seventy days.'
And while they were fulfilling his commands, there passed forty days: for this was the manner with bodies that were embalmed, and Egypt mourned for him seventy days.
וַיִּמְלְאוּ־לוֹ֙ אַרְבָּעִ֣ים י֔וֹם כִּ֛י כֵּ֥ן יִמְלְא֖וּ יְמֵ֣י הַחֲנֻטִ֑ים וַיִּבְכּ֥וּ אֹת֛וֹ מִצְרַ֖יִם שִׁבְעִ֥ים יֽוֹם׃
3 Church Fathers comment on this verse
He grieved for him for forty days, the duration of his entombment, and 'Egypt mourned for seventy days.'
For a duration of forty days, it is also posited by Diodorus that this was the case. The Egyptians engaged in mourning for a period of seventy days. Herodotus suggests that this specific number of days was designated for the actual process of embalming, as well as the mourning rituals. This time was marked by mourning practices that involved laying feathers upon the head and face, parading through the streets while striking the body, abstaining from baths, wine, meat, fine clothing, and other forms of indulgence.
The process of preparing Jacob for burial took forty days, while the period of grief extended to seventy days, which included the embalming. The mourning rituals involved various expressions of sorrow: individuals smeared mud on their faces and heads, roamed the city with unkempt hair, donned torn garments, struck their bare chests, filled the atmosphere with wails of profound grief, and abstained from bathing, wine, meat, and all forms of indulgence. The Egyptians engaged in these mourning practices as a sign of honor for their benefactor Joseph, despite having no personal connection to Jacob.
Passages read together with this verse.