2 Samuel 17:17-22

17And Jonathan and Ahimaaz stayed by En-rogel; and the maid went and told them; and they went and told king David, for they might not be seen to come into the city.

18But a lad saw them, and told Absalom. Then they went both of them away quickly, and came to the house of a man at Bahurim, who had a well in his court; and they went down there.

19And the woman took and spread the covering over the well's mouth, and spread ground corn on it; and the thing was not known.

20And Absalom's servants came to the woman to the house, and said, Where are Ahimaaz and Jonathan? And the woman said to them, They have gone over the brook of water. And they sought and could not find [them], and returned to Jerusalem.

21And it came to pass after they had departed, that they came up out of the well, and went and told king David; and they said to David, Arise and pass quickly over the water; for thus has Ahithophel counselled against you.

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