God appeared to Abraham by the terebinth trees of Mamre and promised that, within a year, Sarah would have a son. However, during the ensuing year, Abraham traveled to Gerar where he repeats his failure from Egypt and almost jeopardizes the plan of God. God speaks to Abimelech in a dream and warns him not to touch Sarah. God protected His chosen vessels and His ordained plan. Sarah then gives birth to Isaac fulfilling the promise that God had made to Abram 25 years earlier. In time, Sarah becomes at odds with Hagar and calls upon Abraham to send away Hagar and her son by Abraham, Ishmael. God uses the symbolism of this division between Sarah and Hagar in the New Testament to discuss the profit, purpose, and path of Christian liberty.