KJV : At the appointment <06310> of Aaron <0175> and his sons <01121> shall be all the service <05656> of the sons <01121> of the Gershonites <01649>, in all their burdens <04853>, and in all their service <05656>: and ye shall appoint <06485> (8804) unto them in charge <04931> all their burdens <04853>. {appointment: Heb. mouth}NASB : "All the service of the sons of the Gershonites, in all their loads and in all their work, shall be \i1 performed\i0 at the command of Aaron and his sons; and you shall assign to them as a duty all their loads.NASB# : "All<3605> the service<5656> of the sons<1121> of the Gershonites<1649>, in all<3605> their loads<4853> and in all<3605> their work<5656>, shall be <I>performed</I> at the command<6310> of Aaron<175> and his sons<1121>; and you shall assign<6485> to them as a duty<4931> all<3605> their loads<4853>.