KJV: Now I beseech you, brethren, mark them which cause divisions and offences contrary to the doctrine which ye have learned; and avoid them.
NASB: Now I urge you, brethren, keep your eye on those who cause dissensions and hindrances contrary to the teaching which you learned, and turn away from them.
KJV: And a stone of stumbling, and a rock of offence,even to them which stumble at the word, being disobedient: whereunto also they were appointed.
NASB: and, "A STONE OF STUMBLING AND A ROCK OF OFFENSE"; for they stumble because they are disobedient to the word, and to this doom they were also appointed.
KJV: But I have a few things against thee, because thou hast there them that hold the doctrine of Balaam, who taught Balac to cast a stumblingblock before the children of Israel, to eat things sacrificed unto idols, and to commit fornication.
NASB: But I have a few things against you, because you have there some who hold the teaching of Balaam, who kept teaching Balak to put a stumbling block before the sons of Israel, to eat things sacrificed to idols and to commit acts of immorality.