Deuteronomy 4:34-35

Or hath God assayed to go and take him a nation from the midst of another nation, by trials, by signs, and by wonders, and by war, and by a mighty hand, and by an outstretched arm, and by great terrors, according to all that Jehovah your God did for you in Egypt before your eyes? Unto thee it was showed, that thou mightest know that Jehovah he is God; there is none else besides him.