What does 1 Samuel 14:46 mean?

Then Saul said to Jonathan, “Tell me what you have done!” Jonathan told him, and said, “I certainly did taste a little honey with the end of the rod that was in my hand; and behold, I must die.”

Saul said, “God do so and more also; for you shall surely die, Jonathan.”

The people said to Saul, “Shall Jonathan die, who has worked this great salvation in Israel? Far from it! As Yahweh lives, there shall not one hair of his head fall to the ground; for he has worked with God today!” So the people rescued Jonathan, that he didn’t die.

Now when Saul had taken the kingdom over Israel, he fought against all his enemies on every side, against Moab, and against the children of Ammon, and against Edom, and against the kings of Zobah, and against the Philistines. Wherever he turned himself, he defeated them.

He did valiantly, and struck the Amalekites, and delivered Israel out of the hands of those who plundered them.

Now the sons of Saul were Jonathan, Ishvi, and Malchishua; and the names of his two daughters were these: the name of the firstborn Merab, and the name of the younger Michal.