II Thessalonians 2:3

KJV - Let no man deceive you by any means: for that day shall not come, except there come a falling away first, and that man of sin be revealed, the son of perdition; (A, Byz)

NASV - Let no one in any way deceive you, for it will not come unless the apostasy comes first, and the man of lawlessness is revealed, the son of destruction, (Aleph, B)

II Thessalonians 2:4

KJV - Who opposeth and exalteth himself above all that is called God, or that is worshipped; so that he as God sitteth in the temple of God, shewing himself that he is God. (Byz)

NASV - who opposes and exalts himself above every so-called god or object of worship, so that he takes his seat in the temple of God, displaying himself as being God. (Aleph, A, B)

II Thessalonians 3:6

KJV - Now we command you, brethren, in the name of our Lord Jesus Christ, that ye withdraw yourselves from every brother that walketh disorderly, and not after the tradition which he received of us. (no major manuscripts)

NASV - Now we command you, brethren, in the name of our Lord Jesus Christ, that you keep away from every brother who leads an unruly life and not according to the tradition which you received from us. (Aleph, A)

II Thessalonians 3:18

KJV - The grace of our Lord Jesus Christ be with you all. Amen. (A, Byz)

NASV - The grace of our Lord Jesus Christ be with you all. (Aleph, B)