5 In all, Jacob had seventy descendants in Egypt, including Joseph, who was already there. 6 In time, Joseph and all of his brothers died, ending that entire generation. 7 But their descendants, the Israelites, had many children and grandchildren. In fact, they multiplied so greatly that they became extremely powerful and filled the land.
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.