1. He was justified BEFORE he was circumcised: Rom. 4:10 How was it then reckoned? when he was in circumcision, or in uncircumcision? Not in circumcision, but in uncircumcision. 11 And he received the sign of circumcision, a seal of the righteousness of the faith which he had yet being uncircumcised: that he might be the father of all them that believe, though they be not circumcised; that righteousness might be imputed unto them also: 12 And the father of circumcision to them who are not of the circumcision only, but who also walk in the steps of that faith of our father Abraham, which he had being yet uncircumcised. 2. He was justified AT LEAST by Genesis 15:6 Rom. 4:3 For what saith the scripture? Abraham believed God, and it was counted unto him for righteousness. Genesis 15:6 6 And he believed in the LORD; and he counted it to him for righteousness. NOTE: However, the Hebrew term translated "believed" is found in the Perfect tense and looks back into the past where this was a completed action that stands completed up to this point. It should have been translated "HAD believed." This is confirmed by Paul in Galatians 3:6-8 where the justification by faith of Abraham is said to have occurred in Genesis 12:3: Gal. 3:6Even as Abraham believed God, and it was accounted to him for righteousness. 7 Know ye therefore that they which are of faith, the same are the children of Abraham. 8 And the scripture, foreseeing that God would justify the heathen through faith, preached before the gospel unto Abraham, saying, In thee shall all nations be blessed. Gen. 12:1 ¶ Now the LORD had said unto Abram, Get thee out of thy country, and from thy kindred, and from thy father’s house, unto a land that I will shew thee: 2 And I will make of thee a great nation, and I will bless thee, and make thy name great; and thou shalt be a blessing: 3 And I will bless them that bless thee, and curse him that curseth thee: and in thee shall all families of the earth be blessed. NOTE: However, the Perfect tense is correctly translated in Genesis 12:1 "HAD said" demonstrating this conversation took place while Abram was still in his own "country" as well as his Father's house and that brings it back to the time he was in "Ur of the Chaldees" in Genesis 11:28-31. Terah had lost his son "Haran" (Gen. 11:28) and when Abram hearkened to the gospel call (Gal. 3:8) Terah and the rest of the family decided to go with Abram as their intent was to go to Canaan but stopped short at Haran: Gen. 11: 27 ¶ Now these are the generations of Terah: Terah begat Abram, Nahor, and Haran; and Haran begat Lot. 28 And Haran died before his father Terah in the land of his nativity, in Ur of the Chaldees. 29 And Abram and Nahor took them wives: the name of Abram’s wife was Sarai; and the name of Nahor’s wife, Milcah, the daughter of Haran, the father of Milcah, and the father of Iscah. 30 But Sarai was barren; she had no child. 31 And Terah took Abram his son, and Lot the son of Haran his son’s son, and Sarai his daughter in law, his son Abram’s wife; and they went forth with them from Ur of the Chaldees, to go into the land of Canaan; and they came unto Haran, and dwelt there. Abraham was justified by faith in the gospel in Ur of the Chaldees (Gal. 3;8; Gen. 12:1-3). I believed he shared the gospel truth with his father and that is why it says that "Terah took Abram his son......and they went forth with them from UR of the Chaldees, to go into the land of Canaan" as that was the Land God had directed him to go after being justified by faith.