TSK · 2 Samuel 15:35

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.

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.