Early wars were fought between tribes as a whole, but in later times, when two individuals in different tribes had a dispute, instead of both tribes fighting, the two disputants engaged in a duel. It also became a custom for two armies to stake all on the outcome of a contest between a representative chosen from each side, as in the instance of David and Goliath.
Close in meaning, found by a language model. A match does not mean the teachings are the same.
Now the Philistines gathered together their armies to battle; and they were gathered together at Socoh, which belongs to Judah, and encamped between Socoh and Azekah in Ephesdammim. Saul and the men of Israel were gathered together, and encamped in the valley of Elah, and set the battle in array against the Philistines. The Philistines stood on the mountain on the one side, and Israel stood on the mountain on the other side: and there was a valley between them. A champion out of the camp of the Philistines named Goliath of Gath, whose height was six cubits and a span went out. He had a helmet of bronze on his head, and he wore a coat of mail; and the weight of the coat was five thousand shekels of bronze. He had bronze shin armor on his legs and a bronze javelin between his shoulders. The staff of his spear was like a weaver’s beam; and his spear’s head weighed six hundred shekels of iron. His shield bearer went before him. He stood and cried to the armies of Israel, and said to them, “Why have you come out to set your battle in array? Am I not a Philistine, and you servants to Saul? Choose a man for yourselves, and let him come down to me. If he is able to fight with me and kill me, then will we be your servants; but if I prevail against him and kill him, then you will be our servants and serve us.” The Philistine said, “I defy the armies of Israel today! Give me a man, that we may fight together!”
David rose up early in the morning and left the sheep with a keeper, and took the provisions and went, as Jesse had commanded him. He came to the place of the wagons as the army which was going out to the fight shouted for the battle. Israel and the Philistines put the battle in array, army against army. David left his baggage in the hand of the keeper of the baggage and ran to the army, and came and greeted his brothers. As he talked with them, behold, the champion, the Philistine of Gath, Goliath by name, came up out of the ranks of the Philistines, and said the same words; and David heard them. All the men of Israel, when they saw the man, fled from him and were terrified. The men of Israel said, “Have you seen this man who has come up? He has surely come up to defy Israel. The king will give great riches to the man who kills him, and will give him his daughter, and will make his father’s house tax-free in Israel.”
When the Philistine arose, and walked and came near to meet David, David hurried and ran toward the army to meet the Philistine. David put his hand in his bag, took a stone and slung it, and struck the Philistine in his forehead. The stone sank into his forehead, and he fell on his face to the earth. So David prevailed over the Philistine with a sling and with a stone, and struck the Philistine and killed him; but there was no sword in David’s hand. Then David ran, stood over the Philistine, took his sword, drew it out of its sheath, killed him, and cut off his head with it. When the Philistines saw that their champion was dead, they fled.