(17) And smote.--The original leaves it doubtful whether Abishai is the nominative to the verb, or whether it should be simply he, referring to David. 2Samuel 21:22 seems to imply that one at least of the sons of the giant fell by David's own hand.

Sware unto him.--This was a solemn transaction, by which David should hereafter be restrained from personal exposure in battle. That he should be spoken of as "the light of Israel" implies that his government over all Israel had continued long enough already to make its immense benefits sensible.

Verse 17. - The men of David sware unto him. David's men were specifically the mighties, who had so long been his friends and companions. They now bound him by an oath never again to fight in person, lest he should be singled out for combat by some warrior among the enemy and slain. The light of Israel. The lamp in the dwelling was the proof that there was life there, and so it became the symbol of prosperity. In Job 18:5, 6 the extinction of the lamp signifies the destruction of the family. David was evidently now king, and under him Israel was advancing to freedom and empire. His death would have plunged the nation back into weakness and probable ruin.

21:15-22 These events seem to have taken place towards the end of David's reign. David fainted, but he did not flee, and God sent help in the time of need. In spiritual conflicts, even strong saints sometimes wax faint; then Satan attacks them furiously; but those who stand their ground and resist him, shall be relieved and made more than conquerors. Death is a Christian's last enemy, and a son of Anak; but through Him that triumphed for us, believers shall be more than conquerors at last, even over that enemy.But Abishai the son of Zeruiah succoured him,.... Observing him in danger, made haste to his relief:

and smote the Philistine, and killed him; it seems as if Abishai engaged with the Philistine, and killed him; but inasmuch as it will bear to be interpreted of David, and since the four giants here and hereafter mentioned are said to fall by the hand of David and his servants, 2 Samuel 21:22, it may be thought that this man fell by his hand; seeing it is clear that all the rest fell by the hands of his servants:

then the men of David sware unto him; after they had observed the danger he was exposed unto, and how narrowly he escaped with his life:

saying, thou shalt go no more with us to battle; they had persuaded him not to go to the battle with Absalom; they had suffered him to go with them now, he being, no doubt, forward and pressing to it; but now they were resolute, and determined he should never go more:

that thou quench not the light of Israel; signifying that their glory and prosperity depended on his life, and that, should he be taken away, they should be in affliction and adversity, their honour and their happiness would be at an end; the Targum is,"thou mayest not extinguish the kingdom of Israel,''the light and glory of it.