"For with a strong hand did the LORD take you out from this"
"Hand" is a reference to domain, like "and he took all of his land from his hand". This means that the power of the Exodus from Egypt caused the Israelites, since we were chosen from all peoples and we were exalted above all tongues, that we would not stand under any dominion other than the Domain of the LORD alone, may He be blessed. And through His Strength we are able to overpower any dominion.
(Divrei Binah - Parshas Bo p. 44)