2 Samuel 17:15-17

17:15 Then Hushai reported to Zadok and Abiathar the priests, “Here is what Ahithophel has advised Absalom and the leaders of Israel to do, and here is what I have advised. 17:16 Now send word quickly to David and warn him, “Don’t spend the night at the fords of the desert tonight. Instead, be sure you cross over, or else the king and everyone who is with him may be overwhelmed.”

17:17 Now Jonathan and Ahimaaz were staying in En Rogel. A female servant would go and inform them, and they would then go and inform King David. It was not advisable for them to be seen going into the city.