'Counsel' in the Bible

Just then, someone told David, "Ahithophel is one of Absalom's conspirators!" So David prayed, "LORD, please turn Ahithophel's counsel into foolishness."

Now Ahithophel's advice that he provided at that time was being compared to one who inquired of God, so highly regarded was Ahithophel's counsel by both David and Absalom.

Meanwhile, when Ahithophel observed that his counsel was not being acted upon, he saddled his donkey, got up, and left for his hometown. Leaving behind a set of orders for his household, he hanged himself. After his death he was buried in his father's tomb.