'For Us' in the Bible

And it happened after the death of Joshua, the children of Israel asked Jehovah, saying, Who shall go up first for us against the Canaanites to fight against them?

And when their hearts were merry, it happened that they said, Call for Samson and he will make sport for us. And they called for Samson out of the prison house. And he made sport for them, and they set him between the pillars.