Matthew Henry on 1 Samuel 17:1-11
It was not long ago that the Philistines were soundly beaten, and put to the worse, before Israel, and they would have been totally routed if Saul's rashness had not prevented; but here we have them making head again. Observe,
I. How they defied Israel with their armies, Sa1 17:1. They made a descent upon the Israelites' country, and possessed themselves, as it should seem, of some part of it, for they encamped in a place which belonged to Judah. Israel's ground would never have been footing for Philistine-armies if Israel had been faithful to their God. The Philistines (it is probable) had heard that Samuel had fallen out with Saul and forsaken him, and no longer assisted and advised him, a…
Read the whole note in the consoleJamieson-Fausset-Brown on 1 Samuel 17:8
I defy the armies of Israel . . .; give me a man, that we may fight together--In cases of single combat, a warrior used to go out in front of his party, and advancing towards the opposite ranks, challenge someone to fight with him. If his formidable appearance, or great reputation for physical strength and heroism, deterred any from accepting the challenge, he used to parade himself within hearing of the enemy's lines, specify in a loud, boastful, bravado style, defying them, and pouring out torrents of abuse and insolence to provoke their resentment.
Adam Clarke on 1 Samuel 17:9
Then will we be your servants - Of this stipulation we hear nothing farther.
John Gill on 1 Samuel 17:9
If he be able to fight with me, and to kill me, then will we be your servants,.... For which it does not appear he had any commission or authority to say; nor did the Philistines think themselves obliged to abide by what he said, since, when he was slain, they did not yield themselves servants to the Israelites:
but if I prevail against him, and kill him, then shall ye be our servants, and serve us; to which terms also the Israelites did not consent; nor did David, who engaged with him, enter the fray on such conditions.