'For Us' in the Bible

and hath raised up a horn of salvation for us in the house of his servant David:

And Jesus said to him, Forbid him not; for he that is not against us, is for us.

When the master of the family shall have arisen, and shut the door, and ye shall begin to stand without, and to knock at the door, saying, Master, master, open it for us! and he answering will tell you, I know you not whence ye are:

Is it lawful for us to pay tribute to Caesar, or not?

saying, Master, Moses wrote for us, If a man's brother die, having a wife, and he die childless, that his brother should take the wife, and raise up seed for his brother.

And he sent Peter and John, saying, Go, prepare for us the passover, that we may eat it.