Deuteronomy 4:33-35

33Did [any] people ever hear the voice of God speaking out of the midst of the fire, as you heard, and [still] live?

34Or has any [man-made] god ever tried to go and take for himself a nation from within another nation by trials, by signs and wonders and by war and by a mighty hand and by an outstretched arm and by great terrors, as the Lord your God did for you in Egypt before your [very] eyes?

35It was shown to you so that you might have [personal] knowledge and comprehend that the Lord is God; there is no other besides Him.