What does Exodus 1:5 mean?
Moses, the author of the book of Exodus, notes that the descendants of Jacob were "seventy persons." This seems to be a deliberately round number, rather than an exact count of the family. The extended family would have been well over seventy at this time, not even including servants. The same number seventy is also recorded in Genesis 46:27. This included Joseph, Joseph's wife, and his two sons Manasseh and Ephraim, though they were "already in Egypt."The emphasis of the number seventy in this verse is primarily focused on the contrast between the small number of people in Jacob's family when they entered Egypt versus the size of the nation of Israel four hundred years later (Exodus 12:40). By the time of Moses, the "sons of Israel" were numerous enough to frighten the king of Egypt (Exodus 1:9). God had fulfilled His promise to turn Abraham into a nation (Genesis 12:1–3).