'For Us' in the Bible

After the death of Joshua, the {Israelites} inquired of Yahweh, saying, "Who will go up first for us against the Canaanites to fight against them?"

And the elders of Gilead said to Jephthah, "That being so, we have now returned to you, that you may go with us {to fight} against the {Ammonites} and become for us as head of all the inhabitants of Gilead."

And they said to him, "Keep quiet! Put your hand on your mouth and come with us and be for us a father and a priest. Is it better being a priest for a house of one man or being a priest for a tribe and clan in Israel?"