'Agreement' in the Bible

Now Herod had been in a violent quarrel with the people of Tyre and Sidon. So they came to him as a group. After they had won over Blastus, who oversaw security for the king's sleeping quarters, they asked for a peace agreement because their country depended on the king's country for food.

Brothers, in the name of our Lord Jesus the Messiah, I urge all of you to be in agreement and not to have divisions among you, so that you may be perfectly united in your understanding and opinions.

What agreement can a temple of God make with idols? For we are the temple of the living God, just as God said: "I will live and walk among them. I will be their God, and they will be my people."

Brothers, let me use an example from everyday life. Once an agreement has been ratified, no one can cancel it or add conditions to it.