Rashi on Exodus 14:31/רש"י על שמות י״ד:ל״א

1את היד הגדלה denotes THE GREAT power which the HAND of the Holy One, blessed be He, had exercised. There are many meanings that are appropriate to the expression יד, hand, but all of them really signify the actual hand, and he who is explaining it must adapt the language according to the meaning of the passage.