And he took his staff in his hand, and chose him five smooth stones out of the brook, and put them in a shepherd's bag which he had, even in a scrip; and his sling was in his hand: and he drew near to the Philistine.

And he took his staff, which he had always in his hands: and chose him five smooth stones out of the brook, and put them into the shepherd's scrip, which he had with him, and he took a sling in his hand, and went forth against the Philistine.

And he took his staff in his hand, and chose him five smooth stones out of the brook, and put them in the shepherd's bag that he had, into the pocket; and his sling was in his hand. And he drew near to the Philistine.

And he taketh his staff in his hand, and chooseth for him five smooth stones from the brook, and putteth them in the shepherds' habiliments that he hath, even in the scrip, and his sling is in his hand, and he draweth nigh unto the Philistine.

And he took his staff in his hand, and chose him five smooth stones out of the brook, and put them in a shepherd's bag which he had, even in a money; and his sling was in his hand: and he drew near to the Philistine.

Then he took his stick in his hand, and got five smooth stones from the bed of the stream and put them in a bag such as is used by sheep-keepers; and in his hand was a leather band used for sending stones: and so he went in the direction of the Philistine.

And he took up his staff, which he held always in his hands. And he chose for himself five very smooth stones from the torrent. And he put them into the shepherd's bag that he had with him. And he took up a sling in his hand. And he went out against the Philistine.

He took his staff - What we would call his crook.
Five smooth stones -
1. Had they been rough or angular, they would not have passed easily through the air, and their asperities would, in the course of their passage, have given them a false direction.
2. Had they not been smooth, they could not have been readily despatched from the sling.
A shepherd's bag - That in which he generally carried his provisions while keeping the sheep in the open country.
And his sling - The sling, both among the Greeks and Hebrews, has been a powerful offensive weapon. See what has been said on Judges 20:16 (note). It is composed of two strings and a leathern strap; the strap is in the middle, and is the place where the stone or bullet lies. The string on the right end of the strap is firmly fastened to the hand; that on the left is held between the thumb and middle joint of the fore finger. It is then whirled two or three times round the head; and when discharged, the finger and thumb let go their hold of the left end string. The velocity and force of the sling are in proportion to the distance of the strap, where the bullet lies, from the shoulder joint. Hence the ancient Baleares, or inhabitants of Majorca and Minorca, are said to have had three slings of different lengths, the longest they used when the enemy was at the greatest distance; the middle one, on their nearer approach; and the shortest, when they came into the ordinary fighting distance in the field. The shortest is the most certain, though not the most powerful. The Balearians are said to have had one of their slings constantly bound about their head, to have used the second as a girdle, and to have carried the third always in their hand. See Diod. Sic. lib. v., c. 18, p. 286, edit. Bipont.
In the use of the sling it requires much practice to hit the mark; but when once this dexterity is acquired, the sling is nearly as fatal as the musket or bow; see on 1-Samuel 17:49 (note). David was evidently an expert marksman; and his sling gave him greatly the advantage over Goliath; an advantage of which the giant does not seem to have been aware. He could hit him within any speaking distance, if he missed once, he had as many chances as he had stones; and after all, being unencumbered with armor, young, and athletic, he could have saved his life by flight. Against him the Philistine could do but little, except in close fight; it is true he appears to have had a javelin or missile spear, (see on 1-Samuel 17:6 (note)), but David took care to prevent the use of all such weapons, by giving him the first blow.

And he took his (n) staff in his hand, and chose him five smooth stones out of the brook, and put them in a shepherd's bag which he had, even in a scrip; and his sling [was] in his hand: and he drew near to the Philistine.
(n) So that by these weak means, It might be known that only God was the author of this victory.

And he took his staff in his hand,.... His shepherd's staff, which he used in keeping his father's sheep, and chose rather to appear in the habit of a shepherd than of a soldier:
and chose him five smooth stones out of the brook; which ran in the valley, which became smooth by lying in the water running over them; and which being smooth were fitter for his purpose, being the more easily cast out of the sling; though De Dieu is of opinion that these were parts or pieces of stones, cleft ones, which were rough and rugged, and which would more easily and firmly be fixed in the forehead of the Philistine:
and put them in a shepherd's bag which he had, even in a scrip; in which he had been wont to put things he needed for the good of the flock, and was such as travellers put their food in; and this might also be the use of it with shepherds; but, according to the Ethiopic interpreters (k), it was that piece of the leather in the midst of the sling, in which the slingers used to put the stones, that they might stick the more firmly:
and his sling was in his hand; which he intended to use in slinging the stone or stones he had in his scrip; and which was an exercise he had been accustomed to in all likelihood, and for which the Benjaminites his neighbours, of the next tribe, were very famous:
and he drew near to the Philistine; marched towards him, thereby signifying that he accepted his challenge, and would enter the list with him.
(k) Apud Ludolf. Lexic. Ethiop. p. 84.

The security and presumption of fools destroy them. Nothing can excel the humility, faith, and piety which appear in David's words. He expressed his assured expectation of success; he gloried in his mean appearance and arms, that the victory might be ascribed to the Lord alone.

brook--wady.
bag--or scrip for containing his daily food.
sling--The sling consisted of a double rope with a thong, probably of leather, to receive the stone. The slinger held a second stone in his left hand. David chose five stones, as a reserve, in case the first should fail. Shepherds in the East carry a sling and stones still, for the purpose of driving away, or killing, the enemies that prowl about the flock.

Staff - His shepherd's staff. These arms in themselves were contemptible, yet chosen by David; because he had no skill to use other arms; because he had inward assurance of the victory, even by these weapons; and because such a conquest would be more honourable to God, and most shameful, and discouraging to the Philistines.