Jamieson, Fausset and Brown on Exodus 18:13-26

13-26. on the morrow ... Moses sat to judge the people, &c.--We are here presented with a specimen of his daily morning occupations; and among the multifarious duties his divine legation imposed, it must be considered only a small portion of his official employments. He appears in this attitude as a type of Christ in His legislative and judicial characters.

the people stood by Moses from the morning unto the evening, &c.--Governors in the East seat themselves at the most public gate of their palace or the city, and there, amid a crowd of applicants, hear causes, receive petitions, redress grievances, and adjust the claims of contending parties.