'Behalf' in the Bible

I heard the voice of the sovereign master say, "Whom will I send? Who will go on our behalf?" I answered, "Here I am, send me!"

Then I will call Uriah the priest and Jeberechiah's son Zechariah as reliable witnesses to testify on my behalf."

When they say to you, “Consult the spirits of the dead and the spiritists who chirp and mutter,” shouldn’t a people consult their God? Should they consult the dead on behalf of the living?

Perhaps the Lord your God will hear all these things the chief adviser has spoken on behalf of his master, the king of Assyria, who sent him to taunt the living God. When the Lord your God hears, perhaps he will punish him for the things he has said. So pray for this remnant that remains.'"

So I will assign him a portion with the multitudes, he will divide the spoils of victory with the powerful, because he willingly submitted to death and was numbered with the rebels, when he lifted up the sin of many and intervened on behalf of the rebels."

He saw that there was no man,And was amazed that there was no one to intercede [on behalf of truth and right];Therefore His own arm brought salvation to Him,And His own righteousness sustained Him.

From ancient times no one has heard,no one has listened,no eye has seen any God except You,who acts on behalf of the one who waits for Him.

Thus says the Lord,“As the new wine is found in the cluster,And one says, ‘Do not destroy it, for there is benefit in it,’So I will act on behalf of My servantsIn order not to destroy all of them.