1 Samuel 30:6-8

6David was very upset, for the men were thinking of stoning him; each man grieved bitterly over his sons and daughters. But David drew strength from the Lord his God.

7Then David said to the priest Abiathar son of Ahimelech, “Bring me the ephod.” So Abiathar brought the ephod to David.

8David inquired of the Lord, saying, “Should I pursue this raiding band? Will I overtake them?” He said to him, “Pursue, for you will certainly overtake them and carry out a rescue!”