1 Samuel 17:18

¹⁶  And the Philistine drew near morning and evening, and presented himself forty days.

¹⁷  And Jesse said unto David his son, Take now for thy brethren an ephah of this parched corn, and these ten loaves, and run to the camp of thy brethren;

¹⁸  And carry these ten cheeses unto the captain of their thousand, and look how thy brethren fare, and take their pledge.

¹⁹  Now Saul, and they, and all the men of Israel, were in the valley of Elah, fighting with the Philistines.

²⁰  And David rose up early in the morning, and left the sheep with a keeper, and took, and went, as Jesse had commanded him; and he came to the trench, as the host was going forth to the fight, and shouted for the battle.