At the appointment of Aaron and his sons
 As they shall order and direct: 
 shall be all the service of the sons of the Gershonites;
 everyone of them was to take their share, as Aaron and his sons should appoint them: 
 in all their burdens, and in all their service;
 what each of them should carry, and in what they should perform duty: 
 and ye shall appoint to them in charge all their burdens;
 charge them carefully to keep all that were committed to them to bear, that none be lost, not a pin nor a cord.