'Behalf' in the Bible

"Please inquire [of] Yahweh on behalf of us, for Nebuchadnezzar the king of Babylon [is] fighting against us. Perhaps Yahweh will do with us according to all his miraculous acts, so that he may go up from against us."

And seek the prosperity of the city where I have deported you, and pray on behalf of it to Yahweh, for in its prosperity you will have prosperity.'