KJV: My little children, these things write I unto you, that ye sin not. And if any man sin, we have an advocate with the Father, Jesus Christ the righteous:
NASB: My little children, I am writing these things to you so that you may not sin. And if anyone sins, we have an Advocate with the Father, Jesus Christ the righteous;
KJV: Not as Cain, who was of that wicked one, and slew his brother. And wherefore slew he him? Because his own works were evil, and his brother's righteous.
NASB: not as Cain, who was of the evil one and slew his brother. And for what reason did he slay him? Because his deeds were evil, and his brother's were righteous.
KJV: And they sing the song of Moses the servant of God, and the song of the Lamb, saying, Great and marvellous are thy works, Lord God Almighty; just and true are thy ways, thou King of saints.
NASB: And they sang the song of Moses, the bond-servant of God, and the song of the Lamb, saying, "Great and marvelous are Your works, O Lord God, the Almighty; Righteous and true are Your ways, King of the nations!
KJV: For true and righteousare his judgments: for he hath judged the great whore, which did corrupt the earth with her fornication, and hath avenged the blood of his servants at her hand.
NASB: BECAUSE HIS JUDGMENTS ARE TRUE AND RIGHTEOUS; for He has judged the great harlot who was corrupting the earth with her immorality, and HE HAS AVENGED THE BLOOD OF HIS BOND-SERVANTS ON HER."