Do Warriors Get Tired?

Lately, I've been studying about David. Specifically, I've been reading the story about how he took out Goliath. Then I continued that study with how his men ended up taking out the four brothers of Goliath. I have a suspicion that David would have really liked to have done that himself but it didn't work out that way. The story of how Goliath's brothers were all taken down is in 2 Samuel 21. In verse 14, Saul and Jonathan were buried. Then in verse 15, it starts walking the reader through a series of battles. These four giants were not taken down in just one battle, like caregiving, it just went from one battle to the next, back-to-back. But David didn't get to "play." In verse 15, it says they were all down fighting with the Philistines but David became weary . His men told him he could no longer go to battle with them because it was too risky. As I read it, I thought David was a mighty warrior. He was accustomed to the battle. He never lost! Y...