Quoting Commentary for I Samuel 15:19

העיט THE BIRD OF PREY— It is a bird so called because it swoops down (עט) greedily upon dead bodies, darting quickly upon its food. Similarly we have the verbal form (1 Samuel 15:19) “And thou didst pounce down (ותעט) upon the spoil”.

And He connected this matter to the blessing Benjamin is a wolf that will tear, to rebuke also the judges of Israel that they should not tear [prey] in war more than necessary, as it is written Her judges are evening wolves, they leave nothing for the morning (Zephaniah 3:3). The prophet accuses them of tearing more than what was necessary, therefore he called them evening wolves, and said they leave nothing for the morning because they did not seek only what was necessary which is given in the morning. And similarly, he accuses Saul, who was from Benjamin, and you did pounce upon the spoils (1 Samuel 15:19) because he did not remember Jacob’s blessing to Benjamin. But regarding Abraham it is said Nothing for me; only what the young men have eaten (Genesis 14:24), he took specifically what they needed to eat and did not distribute to them excessive spoils. And in this, he drew the parable from the wolf who tears [prey] for the need of his food, but sometimes tears and destroys without purpose. And this is a precious interpretation.