20 And David rose up early in the morning, and left the sheep with a keeper, and took his charge and went, as Jesse had commanded him. And he came to the wagon-defence; and the host which was going forth to the battle-array shouted for the fight. 21 And Israel and the Philistines put the battle in array, rank against rank. 22 And David left the things he was carrying in the hand of the keeper of the baggage, and ran into the ranks, and came and saluted his brethren. 23 And 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 And all the men of Israel, when they saw the man, fled from him and were greatly afraid. 25 And the men of Israel said, Have ye seen this man that comes up? for to defy Israel is he come up: and it shall be, that the man who smites him, him will the king enrich with great riches, and will give him his daughter, and make his father's house free in Israel. 26 And David spoke to the men that stood by him, saying, What shall be done to the man that smites 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?
Matthew Henry's Commentary on 1 Samuel 17:20-26
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.