What does 1 Samuel 17:18 mean?
Jesse, an elderly man from Bethlehem (1 Samuel 17:12), is sending his youngest son David to the Israelite camp above the Valley of Elah. There, soldiers are lined up against the Philistines on the opposite side of the valley (1 Samuel 17:1–2). David will be hauling quite a load of food, including ten loaves of bread and about a bushel of roasted grain.In addition, Jesse sends along ten cheeses to give to the commander of his sons' division. The word translated as "thousand" could refer to a clan, division, or unit; it is not always meant as an actual number of soldiers. Jesse's cheese was intended to contribute to the needs of the entire division and not just his own family.
Finally, Jesse lets David know that he wants news back from the battle. He tells the boy to find out if his brothers are well and to get some kind of message, or token of assurance, from them.