2 Samuel 15:12
12 And while Absalom was offering the sacrifices, he sent for1 dAhithophel the Gilonite, David’s counselor, from his city Giloh. And the conspiracy grew strong, and the people with Absalom kept increasing.
2 Samuel 16:23
23 Now in those days the counsel that Ahithophel gave was as if one consulted the word of God; so was all the counsel of Ahithophel esteemed, both by David and by Absalom.
Psalm 41:9
9 Even my close friend in whom I trusted,
pwho ate my bread, has lifted his heel against me.