Deuteronomy 4:35 in the King James Version
Unto thee it was shewed, that thou mightest know that the LORD he is God; there is none else beside him.
Context
34 Or has God tried to go and take a nation for himself from among another nation, by trials, by signs, by wonders, by war, by a mighty hand, by an outstretched arm, and by great terrors, according to all that the LORD your God did for you in Egypt before your eyes?
35 It was shown to you so that you might know that the LORD is God. There is no one else besides him.
36 Out of heaven he made you to hear his voice, that he might instruct you. On earth he made you to see his great fire; and you heard his words out of the middle of the fire.