'Power' in the Bible

And they 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 behold, we must bring into bondage our sons and our daughters to be servants, and some of our daughters are brought into bondage already; neither is it in the power of our hand to redeem them, for other men have our fields and our vineyards.