John Gill Commentary Deuteronomy 4:35

"Unto thee it was showed, that thou mightest know that Jehovah he is God; there is none else besides him." — Deuteronomy 4:35 (ASV)

Unto thee it was showed
What the Lord did in Egypt:

that thou mightest know that the Lord he [is] God, [there is] none else
besides him ;
that he is the one only living and true God, and there is no other: this phrase is often used by the Prophet Isaiah, to express the same great article of faith.