Moses speaks as if Yahweh had rescued the Israelites by paying money to free them from slavery. AT: "you have rescued" (See: [[rc://en/ta/man/translate/figs-metaphor]])
Here "a mighty hand" refers to Yahweh's power. See how you translated similar words in [Deuteronomy 4:34](../04/34.md). AT: "with your mighty power" (See: [[rc://en/ta/man/translate/figs-metaphor]])