Hushai was a friend and counselor of Kind David (2 Sam. 15:32, 37). During Absalom's revolt, Hushai remained faithful to David and became a spy for him in Jerusalem. He gave Absalom bad advice on how to lead his army against David's army. Absalom took his advice over the advice from another counselor, Ahithophel, and this led to the defeat of Absalom's army.
Next person in the Bible: Hushim