12 Now David was the son of that Ephrathite of Bethlehem Judah, whose name was Jesse; and he had eight sons: and the man was an old man in the days of Saul, stricken in years among men. 13 The three eldest sons of Jesse had gone after Saul to the battle: and the names of his three sons who went to the battle were Eliab the firstborn, and next to him Abinadab, and the third Shammah. 14 David was the youngest; and the three eldest followed Saul. 15 Now David went back and forth from Saul to feed his father’s sheep at Bethlehem. 16 The Philistine drew near morning and evening, and presented himself forty days. 17 Jesse said to David his son, “Now take for your brothers an ephah [1] of this parched grain, and these ten loaves, and carry them quickly to the camp to your brothers; 18 and bring these ten cheeses to the captain of their thousand, and see how your brothers are doing, and bring back news.” 19 Now Saul, and they, and all the men of Israel, were in the valley of Elah, fighting with the Philistines. 20 David rose up early in the morning, and left the sheep with a keeper, and took, and went, as Jesse had commanded him; and he came to the place of the wagons, as the army which was going forth to the fight shouted for the battle. 21 Israel and the Philistines put the battle in array, army against army. 22 David left his baggage in the hand of the keeper of the baggage, and ran to the army, and came and greeted his brothers. 23 As he talked with them, behold, there came up the champion, the Philistine of Gath, Goliath by name, out of the ranks of the Philistines, and spoke according to the same words: and David heard them. 24 All the men of Israel, when they saw the man, fled from him, and were terrified. 25 The men of Israel said, “Have you seen this man who is come up? He has surely come up to defy Israel. It shall be, that the man who kills him, the king will enrich him with great riches, and will give him his daughter, and make his father’s house free in Israel.” 26 David spoke to the men who stood by him, saying, “What shall be done to the man who kills this Philistine, and takes away the reproach from Israel? For who is this uncircumcised Philistine, that he should defy the armies of the living God?” 27 The people answered him after this manner, saying, “So shall it be done to the man who kills him.” 28 Eliab his eldest brother heard when he spoke to the men; and Eliab’s anger was kindled against David, and he said, “Why have you come down? With whom have you left those few sheep in the wilderness? I know your pride, and the naughtiness of your heart; for you have come down that you might see the battle.” 29 David said, “What have I now done? Is there not a cause?” 30 He turned away from him toward another, and spoke like that again; and the people answered him again the same way.

Matthew Henry's Commentary on 1 Samuel 17:12-30

Commentary on 1 Samuel 17:12-30

(Read 1 Samuel 17:12-30)

Jesse little thought of sending his son to the army at that critical juncture; but the wise God orders actions and affairs, so as to serve his designs. In times of general formality and lukewarmness, every degree of zeal which implies readiness to go further, or to venture more in the cause of God than others, will be blamed as pride and ambition, and by none more than by near relations, like Eliab, or negligent superiors. It was a trial of David's meekness, patience, and constancy. He had right and reason on his side, and did not render railing for railing; with a soft answer he turned away his brother's wrath. This conquest of his own passion was more honourable than that of Goliath. Those who undertake great and public services, must not think it strange if they are spoken ill of, and opposed by those from whom they expect support and assistance. They must humbly go on with their work, in the face not only of enemies' threats, but of friends' slights and suspicions.