James 1:4

English Standard Version

4 And let steadfastness have its full effect, that you may be perfect and complete, lacking in nothing. (Mt 5:48; 1Th 5:23) 

New International Version

4 Let perseverance finish its work so that you may be mature and complete, not lacking anything. 

New International Reader’s Version

4 And you must allow this strength to finish its work. Then you will be all you should be. You will have everything you need. 

King James Version

4 But let patience have her perfect work, that ye may be perfect and entire, wanting nothing.