'Power' in the Bible

Now these are thy servants and thy people, whom thou hast redeemed by thy great power, and by thy strong hand.

Yet now our flesh is as the flesh of our brethren, our children as their children: and, lo, we bring into bondage our sons and our daughters to be servants, and some of our daughters are brought unto bondage already: neither is it in our power to redeem them; for other men have our lands and vineyards.