An oral culture

As I was reading Exodus 10 to 12, I thought about how repetitive the passage seemed.  Then I recalled what I had heard elsewhere.  The Israelite culture was mainly oral, as no one really read or wrote back then.  Information was passed along via the spoken word.  In order for the Israelites to remember the crucial directions from God, it needed to be repeated a number of times.  That is why we may find some passages to be information overload, but they originally served an important purpose of making sure that God's people knew what they had to do.