Did the Ten Commandments Exist Before Moses?

Many professing Christian leaders and preachers insist that the core of God’s law – the Ten Commandments – has been done away with. They call it the “law of Moses” and claim that it was abolished by Jesus Christ when He offered Himself as the sacrifice on the cross. They assume that the Ten Commandments started with Moses and that they didn’t exist before they were officially given in Exod. 20.