2 Samuel 17:15-19

Then said Hushai unto Zadok and to Abiathar the priests, Thus and thus did Ahithophel counsel Absalom and the elders of Israel; and thus and thus have I counselled.

Now therefore send quickly, and tell David, saying, Lodge not this night in the plains of the wilderness, but speedily pass over; lest the king be swallowed up, and all the people that are with him.

Now Jonathan and Ahimaaz stayed by En-rogel; for they might not be seen to come into the city: and a wench went and told them; and they went and told king David.

Nevertheless a lad saw them, and told Absalom: but they went both of them away quickly, and came to a man’s house in Bahurim, which had a well in his court; whither they went down.

And the woman took and spread a covering over the well’s mouth, and spread ground corn thereon; and the thing was not known.