Moses and the Prophets is a great band name; unfortunately the only band by that name that I've found is kind of terrible. Anyway, that's not what this post is about. This post is about the Bible and how we use it.
In the great story of Lazarus and the Rich Man (another great band name btw), Jesus spells out clearly that the stories of the faith, especially those of the Prophets of God, are vital to our clearly understanding what it is we are called to do; how we are called to live as disciples.
And as if it weren't important enough coming from the lips of Jesus, he has these words coming directly from the Father of all the Israelites, Abraham himself. "They have Moses and the prophets; they should listen to them."
It seems clear then that even as New Covenant followers of God, we should take a keen interest in the words that God has spoken through his prophets; words like remember and sabbath and justice. Words that are summed up well by the prophet Micah, "what does the LORD require of you? To act justly and to love mercy and to walk humbly with your God."
We have Moses and the Prophets, we should listen to them.