KJV : He that saith <3004> (5723) he abideth <3306> (5721) in <1722> him <846> ought <3784> (5719) himself <846> also <2532> so <3779> to walk <4043> (5721), even as <2531> he <1565> walked <4043> (5656).

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NASB : the one who says he abides in Him ought himself to walk in the same manner as He walked.

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NASB# : the one who says<3004> he abides<3306> in Him ought<3784> himself<846> to walk<4043> in the same<3779> manner<3779> as He walked<4043>.