Original Verse:
Genesis Chapter 50 Verse 3And 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.

Reference Verses:
Numbers Chapter 20 Verse 29And when all the congregation saw that Aaron was dead, they mourned for Aaron thirty days, even all the house of Israel.
Deuteronomy Chapter 34 Verse 8And the children of Israel wept for Moses in the plains of Moab thirty days: so the days of weeping and mourning for Moses were ended.
Deuteronomy Chapter 21 Verse 13And she shall put the raiment of her captivity from off her, and shall remain in thine house, and bewail her father and her mother a full month: and after that thou shalt go in unto her, and be her husband, and she shall be thy wife.