Deuteronomy 4:33-35

33Has a people heard God’s voice speaking from the fire as you have, and lived?

34Or has a god attempted to go and take a nation as his own out of another nation, by trials, signs, wonders, and war, by a strong hand and an outstretched arm, by great terrors, as the Lord your God did for you in Egypt before your eyes?

35You were shown these things so that you would know that the Lord is God; there is no other besides him.