From the morning unto the evening - It may be assumed as at least probable that numerous cases of difficulty arose out of the division of the spoil of the Amalekites Exodus 17:13, and causes would have accumulated during the journey from Elim.
Related Commentaries of Exodus 18:13
Exodus 18:13
13 And it came to pass on the morrow, that Moses sat to judge the people: and the people stood by Moses from the morning unto the evening.