How can I myself alone bear your cumbrance, and your burden,
 and your strife?
 ] His meaning is, that he could not hear and try all their causes, and determine all their law suits, and decide the strifes and controversies which arose between them; it was too heavy for him, and brought too much trouble and incumbrance upon him. 
The Brenton translation of the Septuagint is in the public domain.