'For Us' in the Bible

And they said, An Egyptian delivered us out of the hand of the shepherds, and also drew water enough for us, and watered the flock.

Is not this the word that we did tell you in Egypt, saying, Let us alone, that we may serve the Egyptians? For it had been better for us to serve the Egyptians, than that we should die in the wilderness.

And he said unto the elders, Tarry you here for us, until we come again unto you: and, behold, Aaron and Hur are with you: if any man has any matters to judge, let him come unto them.