How could this be? God performs a miracle, but we miss it because we were expecting something different. One verse that struck me came right as God was enacting this great plan to lead them out of Egypt. Pharaoh had finally worn down and they were on the move. They had not yet come upon the Red Sea, but certainly had plenty to praise God for already.
All those who were descendants of Jacob were seventy persons for Joseph was in Egypt already. And Joseph died, all his brothers, and all that generation. Now these are the names of the children of Israel who came to Egypt : The first verses of Exodus reach back some years.
You shall speak all that I command you. And Aaron your brother shall speak to Pharaoh to send the children of Israel out of his land. After the outburst at the end of the previous chapter, we might expect that God had enough with Moses.