1 Samuel 30:7-9

Revised Standard Version

⁷ And David said to Abi′athar the priest, the son of Ahim′elech, “Bring me the ephod.” So Abi′athar brought the ephod to David. ⁸ And David inquired of the Lord, “Shall I pursue after this band? Shall I overtake them?” He answered him, “Pursue; for you shall surely overtake and shall surely rescue.” ⁹ So David set out, and the six hundred men who were with him, and they came to the brook Besor, where those stayed who were left behind.