'Command' in the Bible

"Rabbi," replied Peter, "all night long we have worked hard and caught nothing; but at your command I will let down the nets."

Then He went close and touched the bier, and the bearers halted. "Young man," He said, "I command you, wake!"

and they besought Him not to command them to be gone into the Bottomless Pit.

"If your faith," replied the Lord, "is like a mustard seed, you might command this black-mulberry-tree, 'Tear up your roots and plant yourself in the sea,' and instantly it would obey you.