'Deal' in the Bible

So Abner sent messengers to David at Hebron to ask him, "Who owns this land? Cut a deal with me, and look! I'll lend my hand in bringing all of Israel over to you!"

David replied, "Sounds good to me! I'll cut a deal with you under one condition: you're not to show yourself in my presence unless you bring Saul's daughter with you when you come to see me."

Then ask Amasa, "Aren't you my own flesh and blood? So may God deal with me, no matter how severely, if from this day forward you don't take Joab's place as commander of my army.'