By faith Abraham obeyed when he was called to go out to a place that he was to receive as an inheritance. And he went out, not knowing where he was going.
He received the sign of circumcision as a seal of the righteousness that he had by faith while he was still uncircumcised. The purpose was to make him the father of all who believe without being circumcised, so that righteousness would be counted to them as well,
that is, in Christ God was reconciling the world to himself, not counting their trespasses against them, and entrusting to us the message of reconciliation.
You found his heart faithful before you, and made with him the covenant to give to his offspring the land of the Canaanite, the Hittite, the Amorite, the Perizzite, the Jebusite, and the Girgashite. And you have kept your promise, for you are righteous.