'Obey' in the Bible

And he said unto them, Where is your faith? And being afraid they marvelled, saying one to another, Who then is this, that he commandeth even the winds and the water, and they obey him?

And the Lord said, If ye had faith as a grain of mustard seed, ye would say unto this sycamine tree, Be thou rooted up, and be thou planted in the sea; and it would obey you.