Saul gave an order that no-one should eat on the day of the battle until evening. His son Jonathan ate some wild honey. Saul was furious and considered executing his son Jonathan for eating the wild honey. But changed his mind.
Chapter 13 verse 44
For the rest of his life Saul fought wars with the Philistines.
Chapter 13 verse 52
Interestingly enough, the people were on Jonathan's side because Jonathan had done all the righteous things and Saul had done lost his mind and:
~he didn't have a sane reason at all to decree that ludicrous order that no one eat, especially after the men were weary and starving after fighting the battle.
~Jonathan had ALREADY won the battle (Saul hadn't), and EVERYONE knew that and when Saul was gonna kill his own son Jonathan (based on a decree Saul never should've made fgrom the gitgo) none of them would raise a hand against Jonathan.
They all knew that Saul was attempting to bring evil against his own son Jonathan, without cause.
Check out verses 3 and 4:
3 And Jonathan smote the garrison of the Philistines that was in Geba, and the Philistines heard of it. And Saul blew the trumpet throughout all the land, saying, Let the Hebrews hear.
4 And all Israel heard say that Saul had smitten a garrison of the Philistines, and that Israel also was had in abomination with the Philistines. And the people were called together after Saul to Gilgal.
Jonathan had gotten the victory and Saul attempted to claim credit for it. Saul lied.
Check out verses 9-11:
9 And Saul said, Bring hither a burnt offering to me, and peace offerings. And he offered the burnt offering.
10 And it came to pass, that as soon as he had made an end of offering the burnt offering, behold, Samuel came; and Saul went out to meet him, that he might salute him.
11 And Samuel said, What hast thou done? And Saul said, Because I saw that the people were scattered from me, and that thou camest not within the days appointed, and that the Philistines gathered themselves together at Michmash;
Saul presumed to be a "priest" and offer the burnt offering, even as he knew it was an abomination to do so. Then he lied to Samuel, the prophet and said he was "forced" to offer the offering.