1 Samuel 30:6-15

6And David was greatly distressed; for the people spake of stoning him, because the soul of all the people was grieved, every man for his sons and for his daughters: but David strengthened himself in Jehovah his God.

7And David said to Abiathar the priest, the son of Ahimelech, I pray thee, bring me hither the ephod. And Abiathar brought thither the ephod to David. 8And David inquired of Jehovah, saying, If I pursue after this troop, shall I overtake them? And he answered him, Pursue; for thou shalt surely overtake them, and shalt without fail recover all. 9So David went, he and the six hundred men that were with him, and came to the brook Besor, where those that were left behind stayed. 10But David pursued, he and four hundred men; for two hundred stayed behind, who were so faint that they could not go over the brook Besor.

11And they found an Egyptian in the field, and brought him to David, and gave him bread, and he did eat; and they gave him water to drink; 12and they gave him a piece of a cake of figs, and two clusters of raisins: and when he had eaten, his spirit came again to him; for he had eaten no bread, nor drunk any water, three days and three nights. 13And David said unto him, To whom belongest thou? and whence art thou? And he said, I am a young man of Egypt, servant to an Amalekite; and my master left me, because three days ago I fell sick. 14We made a raid upon the South of the Cherethites, and upon that which belongeth to Judah, and upon the South of Caleb; and we burned Ziklag with fire. 15And David said to him, Wilt thou bring me down to this troop? And he said, Swear unto me by God, that thou wilt neither kill me, nor deliver me up into the hands of my master, and I will bring thee down to this troop.