Then David left his supplies in the care of the quartermaster and ran to the battle line. When he arrived, he asked his brothers how they were doing.
Forty days the two armies lay encamped facing one another, each advantageously posted, but neither forward to engage. Either they were parleying and treating of an accommodation or they were waiting for recruits; and perhaps there were frequent skirmishes between small detached parties.
Commenting on 1 Samuel 17:12-30
And David left his carriage in the hand the keeper of the carriage,.... That is, he left load of provisions he brought with him in the hand of the keeper of the bag and baggage of the army, their clothes, and such like things; not having an opportunity to deliver them to his brethren, who were just going to engage in battle: and ran into...
left his carriage in the hand of the keeper of the carriage--to make his way to the standard of Judah.