Romans 4 : 3-8
2 Corinthians 5:19
Romans 4:3-8King James Version (KJV)
3 For what saith the scripture? Abraham believed God, and it was counted unto him for righteousness.4 Now to him that worketh is the reward not reckoned of grace, but of debt.5 But to him that worketh not, but believeth on him that justifieth the ungodly, his faith is counted for righteousness.6 Even as David also describeth the blessedness of the man, unto whom God imputeth righteousness without work7 Saying, Blessed are they whose iniquities are forgiven, and whose sins are covered.8 Blessed is the man to whom the Lord will not impute sin.
This is not a salvation type righteousness, else Abraham didn't need Jesus(and only needed faith in God) and we all know it was impossible to go to heaven without Jesus. The lord does not impute sin AT THE END to those who obey and believe. obviously sin is still imputed since people still die and the wages of sin is death. this is at the resurrection.
2 Thessalonians 1:7-8King James Version (KJV)
7 And to you who are troubled rest with us, when the Lord Jesus shall be revealed from heaven with his mighty angels,8 In flaming fire taking vengeance on them that know not God, and that obey not the gospel of our Lord Jesus Christ:
taking vengence on those that know not God (belief) and obey not the gospel.
1 John 3:24King James Version (KJV)
24 And he that keepeth his commandments dwelleth in him, and he in him. And hereby we know that he abideth in us, by the Spirit which he hath given us.
recieving the holy ghost is something that requires both belief and obedience(or at start repentance)
Acts 5:32King James Version (KJV)
32 And we are his witnesses of these things; and so is also the Holy Ghost, whom God hath given to them that obey him.
As far as Corinthians Paul laid down the foundations before making that statement
2 Corinthians 5:9-21King James Version (KJV)
9 Wherefore we labour, that, whether present or absent, we may be accepted of him.
10 For we must all
appear before the judgment seat of Christ; that every one may receive the things done in his body, according to that he hath done, whether it be good or bad.
11 Knowing therefore the terror of the Lord, we persuade men; but we are made manifest unto God; and I trust also are made manifest in your consciences.12 For we commend not ourselves again unto you, but give you occasion to glory on our behalf, that ye may have somewhat to answer them which glory in appearance, and not in heart.13 For whether we be beside ourselves, it is to God: or whether we be sober, it is for your cause.14 For the love of Christ constraineth us; because we thus judge, that if one died for all, then were all dead:15 And that he died for all, that they which live should not henceforth live unto themselves, but unto him which died for them, and rose again.16 Wherefore henceforth know we no man after the flesh: yea, though we have known Christ after the flesh, yet now henceforth know we him no more.17 Therefore if any man be in Christ, he is a new creature: old things are passed away; behold, all things are become new.18 And all things are of God, who hath reconciled us to himself by Jesus Christ, and hath given to us the ministry of reconciliation;19 To wit, that God was in Christ, reconciling the world unto himself, not imputing their trespasses unto them; and hath committed unto us the word of reconciliation.20 Now then we are ambassadors for Christ, as though God did beseech you by us: we pray you in Christ's stead, be ye reconciled to God.21 For he hath made him to be sin for us, who knew no sin; that we might be made the righteousness of God in him.
2 Peter 2:20-22King James Version (KJV)20 For if after they have escaped the pollutions of the world through the knowledge of the Lord and Saviour Jesus Christ, they are again entangled therein, and overcome, the latter end is worse with them than the beginning.21 For it had been better for them not to have known the way of righteousness, than, after they have known it, to turn from the holy commandment delivered unto them.22 But it is happened unto them according to the true proverb, The dog is turned to his own vomit again; and the sow that was washed to her wallowing in the mire.
these are clearly people who believed and turned BACK in which he is basically saying it would have been better had they not believed at all
1 John 5:3King James Version (KJV)
3 For this is the love of God, that we keep his commandments: and his commandments are not grievous.