5 All the souls who came out of Jacob’s body were seventy souls, and Joseph was in Egypt already. 6 Joseph died, as did all his brothers, and all that generation. 7 The children of Israel were fruitful, and increased abundantly, and multiplied, and grew exceedingly mighty; and the land was filled with them.
Matthew Henry's Commentary on Exodus 1:5-7
Commentary on Exodus 1:1-7
(Read Exodus 1:1-7)
During more than 200 years, while Abraham, Isaac, and Jacob lived at liberty, the Hebrews increased slowly; only about seventy persons went down into Egypt. There, in about the same number of years, though under cruel bondage, they became a large nation. This wonderful increase was according to the promise long before made unto the fathers. Though the performance of God's promises is sometimes slow, it is always sure.