When you read chapter 28 with all of the sacrifices and memorials the Lord commanded (via Moses) the Israelites to observe were you like me in thinking “I have already read these commands in Exodus and Leviticus why are they repeated?”
This is where I think it is so important for us to keep in mind the time-line of Israel. Yes, these commands were given earlier but to a different group of Israelites. Remember they are now ready to enter the Promised Land after 40 years of travel. And due to their disobedience, the earlier generation has all died. So, Moses repeats the Lord’s command to a new population. There could be no excuse for failing to follow the commands of the Lord!