2 Samuel 17:17-22

17Now Jonathan and Ahimaaz stayed by Enrogel; for they might not be seen to come into the city: and a maidservant went and told them; and they went and told king David. 18Nevertheless a lad saw them, and told Absalom: but they went both of them away quickly, and came to the house of a man in Bahurim, who had a well in his court; into which they descended. 19And the woman took and spread a covering over the well’s mouth, and spread ground grain on it; and the thing was not known. 20And when Absalom’s servants came to the woman to the house, they said, Where is Ahimaaz and Jonathan? And the woman said to them, They have gone over the brook of water. And when they had sought and could not find them, they returned to Jerusalem. 21And it came to pass, after they had departed, that they came out of the well, and went and told king David, and said to David, Arise, and pass quickly over the water: for thus hath Ahithophel counselled against you.

22Then David arose, and all the people that were with him, and they passed over Jordan: by the morning light there was left not one of them that had not gone over Jordan.