'Another's' in the Bible

For your lifeblood I will most certainly require an accounting; from every animal [that kills a person] I will require it. And from man, from every man’s brother [that is, anyone who murders] I will require the life of man.

Go to, let us go down, and there confound their language, that they may not understand one another's speech.

And Mizpah, for he said, May the Lord keep watch on us when we are unable to see one another's doings.