An agreement with God is usually called a covenant.
the covenant
The agreement that God made with man is known as a covenant. In Christianity, one of the key covenants is the covenant between God and the Israelites, as outlined in the Old Testament. In Christianity, the New Covenant is believed to have been established through the life, death, and resurrection of Jesus Christ.
The covenant.
The church teaches that marriage lasts throughout a lifetime because when two people marry in the church, they are making a pact with God as well. When an agreement is made with God, the agreement can never be broken.
I believe this is the convenant that God made with Abraham to make of Abraham's family a great nation.
covenant
The solemn agreement between God and the Israelites is known as the "Covenant" or the "Covenant of Moses." It outlined the terms of their relationship, including God's promises to the Israelites and their responsibilities in return.
They had to believe in only god, including the other nine commandments.
God and Man
God gave the Torah on Mount Sinai to the entire assembled nation of the Israelites (Exodus ch.19-20). This event has no parallel in world history.
My friends and I made an agreement.
A gentleman's agreement is an agreement which is made on each person's word of honor. It is not a legal agreement, but a verbal agreement which can be enforceable in a court of law.