2 Samuel 15:30-37 - Hushai Offers To Serve King David
30 And David went up on Mount Olivet and wept as he went, and had his head covered and went thereto barefoot. And all the people that was with him, had every man his head covered, and as they went, wept also.
31 And one told David, saying, "Ahithophel is one of them that have conspired with Absalom." Then said David, "O LORD, turn the counsel of Ahithophel unto foolishness."
32 When David was come to the top of the mount and had bowed himself unto God: behold, Hushai the Archite came against him with his coat torn and earth upon his head. 33 Unto whom David said, "If thou go with me thou shalt be a burden unto me. 34 And if thou return to the city: then shalt thou say unto Absalom, 'I will be thy servant O king: thus long have I been thy father's servant, and now I am thine,' and destroy me the counsel of Ahithophel. 35 And thou hast there with thee, Zadok and Abiathar the priests, unto which thou shalt show all that thou canst hear out of the king's house. 36 And behold, ye have there with you their two sons: Ahimaaz Zadok's son, and Jonathan Abiathar's son, by which ye shall send me all that ye can hear." 37 And so Hushai, David's friend, gat him to the city. And Absalom also entered into Jerusalem.