Deuteronomy 4:32-34

When the LORD your God brought you out of Egypt, you saw how he fought for you and showed his great power by performing terrifying miracles. You became his people, and at Mount Sinai you heard him talking to you out of fiery flames. And yet you are still alive! Has anything like this ever happened since the time God created humans? No matter where you go or who you ask, you will get the same answer. No one has ever heard of another god even trying to do such things as the LORD your God has done for you.