1 Samuel 15

Thus saith the LORD of hosts, I remember that which Amalek did to Israel, how he laid wait for him in the way, when he came up from Egypt.
1 Samuel 15:2 KJV https://bible.com/bible/1/1sa.15.2.KJV

And Saul gathered the people together, and numbered them in Telaim, two hundred thousand footmen, and ten thousand men of Judah.
1 Samuel 15:4 KJV https://bible.com/bible/1/1sa.15.4.KJV

Saul was now a very powerful king and ruler https://bible.com/bible/1/1sa.15.4.KJV

It repenteth me that I have set up Saul to be king: for he is turned back from following me, and hath not performed my commandments. And it grieved Samuel; and he cried unto the LORD all night.
1 Samuel 15:11 KJV https://bible.com/bible/1/1sa.15.11.KJV

But one could argue that he performes most of the lord commandments for this battle.
But to the lord, half obedience is no obedience at all. https://bible.com/bible/1/1sa.15.11.KJV

But the people took of the spoil, sheep and oxen, the chief of the things which should have been utterly destroyed, to sacrifice unto the LORD thy God in Gilgal.
1 Samuel 15:21 KJV https://bible.com/bible/1/1sa.15.21.KJV

Excuses excuses excuses https://bible.com/bible/1/1sa.15.21.KJV

For rebellion is as the sin of witchcraft, And stubbornness is as iniquity and idolatry. Because thou hast rejected the word of the LORD, He hath also rejected thee from being king.
1 Samuel 15:23 KJV https://bible.com/bible/1/1sa.15.23.KJV

Sauls lows in summary – rebellion and stubbornness https://bible.com/bible/1/1sa.15.23.KJV

Hewed him in pieces, very violent and vengeful.

But Samuel said something interesting, that agag had made others childless and now he was to reap what he sowed.

And Samuel said, As thy sword hath made women childless, so shall thy mother be childless among women. And Samuel hewed Agag in pieces before the LORD in Gilgal.
1 Samuel 15:33 KJV https://bible.com/bible/1/1sa.15.33.KJV

And so a just recopence was laid upon him and he was Hewed to pieces for all his wickedness.

https://bible.com/bible/1/1sa.15.33.KJV