Thy servant slew both the lion and the bear
At different times, and several of them at one time or another; whenever any of them came into the flock, he used to lay hold on them and kill them, with all the ease imaginable. The Jews suppose this phrase denotes many of them F8.
And this uncircumcised Philistine shall be as one of them;
as he was like them in nature, savage, cruel and unclean, so he would be in his end, killed as they; of this David was fully persuaded and assured in mind having an impulse from the Spirit of God, by which he was certified of it:
seeing he hath defied the armies of the living God;
so that as he justly deserved to die, he made no doubt of it it would be his case.