'For Us' in the Bible

And hath raised up a horn of salvation for us In the house of his servant David

And it came to pass, as they were parting from him, Peter said unto Jesus, Master, it is good for us to be here: and let us make three tabernacles; one for thee, and one for Moses, and one for Elijah: not knowing what he said.

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

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