What does 1 Samuel 14:24 mean?

The Israelites were exhausted that day because Saul had made them swear an oath: 'No one can eat anything until evening, until I get revenge on my enemies.' So nobody ate, and everyone was worn out. 1 Samuel 14:24 - Modern Text Bible

(Saul’s rash vow puts unnecessary pressure on his troops, making them fight hungry and tired just to satisfy his pride.)