KJV : From thirty <07970> years <08141> old <01121> and upward <04605> even unto fifty <02572> years <08141> old <01121> shalt thou number <06485> (8799) them, every one that entereth <0935> (8802) into the service <06635>, to do <05647> (8800) the work <05656> of the tabernacle <0168> of the congregation <04150>. {service: Heb. warfare}
NASB : from thirty years and upward even to fifty years old, you shall number them, everyone who enters the service to do the work of the tent of meeting.
NASB# : from thirty<7970> years<8141> and upward<4605> even to fifty<2572> years<8141> old<1121>, you shall number<6485> them, everyone<3605> who enters<935> the service<6635> to do<5647> the work<5656> of the tent<168> of meeting<4150>.